Expected Behavior

A message should be shown when a merge makes no changes to a database when using the gui.

Current Behavior

The gui does not notify the user and the cli sends the message "Database was not modified by merge operation."

Possible Solution

Add a gui dialog to notify the user when the database was not modified by a merge.

Steps to Reproduce

1. Create and save a database
2. Open the database using the gui
3. Duplicate the database file
4. Merge the copy into the current database

Context

Adding the dialog would keep the gui and cli behavior consistent.

Debug Info

KeePassXC - 2.4.0
Revision: a070f1b