Enable merge on synchronazation backed databases

[theking2]

I use a synchronization service to keep the database synchronized between devices. That means that an opened database might be changed by another software (the synchronization software) while being open in KeepassXC. Yet if no change was made to the opened database it cannot be saved and synchronized with the server version, causing changes to be lost.

[droidmonkey]

Are you on 2.7.10? We fixed this.