Tidy up page behaviour on form change

ui/src/pages/home/components/SearchFormWrapper.tsx

@@ -23,6 +23,10 @@ export const SearchFormWrapper: React.FC<{
             delete formattedValues.timezoneEnd
         }
 
+        // When the form changes, reset the pagination back to page=1
+        // Otherwise adding filtering leaves you on page=lots with no posts to view
+        formattedValues.page = "1"
+
         // @ts-ignore
         setSearchParams(formattedValues)
     }