[FEAT] Hope to add a manual save database button

[lvluozixuemengyanyan]

Hope to add a manual save database button，At the same time, automatic saving can also be disabled.

My database has been encrypted a lot of times，This results in a long time required for each save.

So there is an urgent need for a feature that does not automatically save，I hope to save it uniformly after multiple changes are completed.

Believe many users have encountered this problem，hope the developers can update this feature.

[sahriVoraus]

Click the 3 dots when your database is opened and select "Work on internal cache only". Then edit as much as you want without the changes to be synced. If you want to sync your changes you can do it with "Synchronize cache copy with source".