fix: LDP-1778: Push messages into state instead of replacing it on mutation (#92)

* fix: LDP-1778: Skip replacing messages state if messages are empty.

* LDP-1778: Push to messages array instead of replacing it on messages mutation.

Author: TurtlBbx

lib/plugin.mjs

@@ -169,10 +169,14 @@ const storeModule = {
     messages (state, messages) {
       // Make messages be flat array with message type.
       messages = Object.assign({ success: [], error: [] }, messages)
-      state.messages = [
+      const messagesArray = [
         ...messages.error.map(message => ({ type: 'error', message })),
         ...messages.success.map(message => ({ type: 'success', message }))
       ]
+      if (!messagesArray.length) {
+        return
+      }
+      state.messages.push(...messagesArray)
     },
     removeMessage (state, id) {
       state.messages.splice(id, 1)