Alpha 9

Features

• Read-only mode, disabling all database changes
• In-app user guide (copy of TriliumNext docs)
• Light/dark theme override switch (#59)

Bugfixes

• Fixed bug where the note tree may disappear until restart (#83)
• Fixed error when modifying the same entity twice
• Fixed NPE when viewing a deleted note (reported via email)
• Fixed rare background crash when sync login fails (#84)
• Fixed note editor theme & link function (#82, #25)