#1705 Close w/o saving button to be added

[Alexander Politov]

Now the app instantly saves a DB when it is closed (locked), if the auto-save option is enabled in the options. In this case, if some changes are done (e.g., the master-key change), the DB is automatically saved on the app exit/lock. So it is not possible to undo the changes or not to save them.

Some kind of 'Close without saving' button to prevent saving undesired changes is suggested to add.