Updating Semantic domains results in several different errors

[myieye]

Describe the bug
Note these errors currently don't occur when changing the semantic domain of the first sense due to #1073.

If I try to update the semantic domain to 2 semantic domains (or just one, but I think it worked with one a few times, so I'm not sure), I get this stack trace:

[fw-lite:local-web-app] fail: Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher[8]
[fw-lite:local-web-app]       Failed to invoke hub method 'UpdateSense'.
[fw-lite:local-web-app]       System.InvalidCastException: Unable to cast object of type 'System.Text.Json.JsonElement' to type 'MiniLcm.Models.SemanticDomain'.
[fw-lite:local-web-app]          at LcmCrdt.Utils.JsonPatchRewriter.RewriteChanges[T,TProp](JsonPatchDocument`1 patchDocument, Expression`1 expr, Func`4 changeFactory)+MoveNext() in D:\code\languageforge-lexbox\backend\FwLite\LcmCrdt\Utils\JsonPatchRewriter.cs:line 59
[fw-lite:local-web-app]          at LcmCrdt.Objects.Sense.ChangesFromJsonPatch(Sense sense, JsonPatchDocument`1 patch)+MoveNext() in D:\code\languageforge-lexbox\backend\FwLite\LcmCrdt\Objects\Sense.cs:line 41
[fw-lite:local-web-app]          at System.Collections.Generic.List`1.AddRange(IEnumerable`1 collection)
[fw-lite:local-web-app]          at LcmCrdt.CrdtMiniLcmApi.UpdateSense(Guid entryId, Guid senseId, UpdateObjectInput`1 update) in D:\code\languageforge-lexbox\backend\FwLite\LcmCrdt\CrdtMiniLcmApi.cs:line 299
[fw-lite:local-web-app]          at LocalWebApp.Hubs.MiniLcmApiHubBase.UpdateSense(Guid entryId, Guid senseId, JsonPatchDocument`1 update) in D:\code\languageforge-lexbox\backend\FwLite\LocalWebApp\Hubs\MiniLcmApiHubBase.cs:line 83
[fw-lite:local-web-app]          at LocalWebApp.Hubs.CrdtMiniLcmApiHub.UpdateSense(Guid entryId, Guid senseId, JsonPatchDocument`1 update) in D:\code\languageforge-lexbox\backend\FwLite\LocalWebApp\Hubs\CrdtMiniLcmApiHub.cs:line 55
[fw-lite:local-web-app]          at lambda_method25(Closure, Object)
[fw-lite:local-web-app]          at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher`1.ExecuteMethod(ObjectMethodExecutor methodExecutor, Hub hub, Object[] arguments)
[fw-lite:local-web-app]          at LocalWebApp.Hubs.LockedProjectFilter.InvokeMethodAsync(HubInvocationContext invocationContext, Func`2 next) in D:\code\languageforge-lexbox\backend\FwLite\LocalWebApp\Hubs\LockedProjectFilter.cs:line 12
[fw-lite:local-web-app]          at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher`1.<Invoke>g__ExecuteInvocation|18_0(DefaultHubDispatcher`1 dispatcher, ObjectMethodExecutor methodExecutor, THub hub, Object[] arguments, AsyncServiceScope scope, IHubActivator`1 hubActivator, HubConnectionContext connection, HubMethodInvocationMessage hubMethodInvocationMessage, Boolean isStreamCall)

If I replace the only semantic domain on a sense with a different one, I get this stack trace:

Moved to #1099

If I remove all the semantic domains I get this stack trace:

[fw-lite:local-web-app]       Failed to invoke hub method 'UpdateSense'.
[fw-lite:local-web-app]       Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while saving the entity changes. See the inner exception for details.
[fw-lite:local-web-app]        ---> System.NotSupportedException: Runtime type 'LcmCrdt.Changes.RemoveSemanticDomainChange' is not supported by polymorphic type 'SIL.Harmony.Changes.IChange'. Path: $.
[fw-lite:local-web-app]        ---> System.NotSupportedException: Runtime type 'LcmCrdt.Changes.RemoveSemanticDomainChange' is not supported by polymorphic type 'SIL.Harmony.Changes.IChange'.       
[fw-lite:local-web-app]          at System.Text.Json.ThrowHelper.ThrowNotSupportedException_RuntimeTypeNotSupported(Type baseType, Type runtimeType)
[fw-lite:local-web-app]          at System.Text.Json.Serialization.Metadata.PolymorphicTypeResolver.TryGetDerivedJsonTypeInfo(Type runtimeType, JsonTypeInfo& jsonTypeInfo, Object& typeDiscriminator)
[fw-lite:local-web-app]          at System.Text.Json.Serialization.JsonConverter.ResolvePolymorphicConverter(Object value, JsonTypeInfo jsonTypeInfo, JsonSerializerOptions options, WriteStack& state)
[fw-lite:local-web-app]          at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
[fw-lite:local-web-app]          at System.Text.Json.Serialization.JsonConverter`1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
[fw-lite:local-web-app]          --- End of inner exception stack trace ---
[fw-lite:local-web-app]          at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& state, NotSupportedException ex)
[fw-lite:local-web-app]          at System.Text.Json.Serialization.JsonConverter`1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
[fw-lite:local-web-app]          at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Serialize(Utf8JsonWriter writer, T& rootValue, Object rootValueBoxed)
[fw-lite:local-web-app]          at System.Text.Json.JsonSerializer.WriteString[TValue](TValue& value, JsonTypeInfo`1 jsonTypeInfo)
[fw-lite:local-web-app]          at lambda_method730(Closure, IChange)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Storage.ValueConversion.ValueConverter`2.<>c__DisplayClass6_0`2.<SanitizeConverter>b__1(Object v)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping.CreateParameter(DbCommand command, String name, Object value, Nullable`1 nullable, ParameterDirection direction)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken) 
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Update.ReaderModificationCommandBatch.ExecuteAsync(IRelationalConnection connection, CancellationToken cancellationToken)
[fw-lite:local-web-app]          --- End of inner exception stack trace ---
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Update.ReaderModificationCommandBatch.ExecuteAsync(IRelationalConnection connection, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable`1 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable`1 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable`1 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(IList`1 entriesToSave, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(StateManager stateManager, Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.DbContext.SaveChangesAsync(Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at Microsoft.EntityFrameworkCore.DbContext.SaveChangesAsync(Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)
[fw-lite:local-web-app]          at SIL.Harmony.Db.CrdtRepository.AddCommit(Commit commit) in D:\code\languageforge-lexbox\backend\harmony\src\SIL.Harmony\Db\CrdtRepository.cs:line 269
[fw-lite:local-web-app]          at SIL.Harmony.DataModel.Add(Commit commit, Boolean deferSnapshotUpdates) in D:\code\languageforge-lexbox\backend\harmony\src\SIL.Harmony\DataModel.cs:line 88       
[fw-lite:local-web-app]          at SIL.Harmony.DataModel.Add(Commit commit, Boolean deferSnapshotUpdates) in D:\code\languageforge-lexbox\backend\harmony\src\SIL.Harmony\DataModel.cs:line 100      
[fw-lite:local-web-app]          at SIL.Harmony.DataModel.AddChanges(Guid clientId, IEnumerable`1 changes, Guid commitId, CommitMetadata commitMetadata, Boolean deferCommit) in D:\code\languageforge-lexbox\backend\harmony\src\SIL.Harmony\DataModel.cs:line 78
[fw-lite:local-web-app]          at LcmCrdt.CrdtMiniLcmApi.UpdateSense(Guid entryId, Guid senseId, UpdateObjectInput`1 update) in D:\code\languageforge-lexbox\backend\FwLite\LcmCrdt\CrdtMiniLcmApi.cs:line 299
[fw-lite:local-web-app]          at LocalWebApp.Hubs.MiniLcmApiHubBase.UpdateSense(Guid entryId, Guid senseId, JsonPatchDocument`1 update) in D:\code\languageforge-lexbox\backend\FwLite\LocalWebApp\Hubs\MiniLcmApiHubBase.cs:line 83
[fw-lite:local-web-app]          at LocalWebApp.Hubs.CrdtMiniLcmApiHub.UpdateSense(Guid entryId, Guid senseId, JsonPatchDocument`1 update) in D:\code\languageforge-lexbox\backend\FwLite\LocalWebApp\Hubs\CrdtMiniLcmApiHub.cs:line 55
[fw-lite:local-web-app]          at lambda_method25(Closure, Object)
[fw-lite:local-web-app]          at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher`1.ExecuteMethod(ObjectMethodExecutor methodExecutor, Hub hub, Object[] arguments)
[fw-lite:local-web-app]          at LocalWebApp.Hubs.LockedProjectFilter.InvokeMethodAsync(HubInvocationContext invocationContext, Func`2 next) in D:\code\languageforge-lexbox\backend\FwLite\LocalWebApp\Hubs\LockedProjectFilter.cs:line 12
[fw-lite:local-web-app]          at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher`1.<Invoke>g__ExecuteInvocation|18_0(DefaultHubDispatcher`1 dispatcher, ObjectMethodExecutor methodExecutor, THub hub, Object[] arguments, AsyncServiceScope scope, IHubActivator`1 hubActivator, HubConnectionContext connection, HubMethodInvocationMessage hubMethodInvocationMessage, Boolean isStreamCall)