Check before reselecting note in updateNoteContent

[mirka]

Closes #1125

This fixes an issue where a local change to a note's content would reselect that note in the Editor, even when the user had already navigated away to a different note.

To test

Test case from original issue

1. Start a new note
2. Type for a bit on it, then create a new note with the ctrl + N shortcut

↑ Do this quickly. Stop typing and immediately create a new note.

Another test case

1. Type in a note.
2. Immediately click on a different note.