[Feature Request] Add "Save" and "Restore" buttons

[glu8716]

At the moment, the program automatically saves any changes made to the base when selecting another one. However, it would be preferable to save changes manually so that no modifications are applied by mistake. For the same reason, a “Restore” button to revert the base to its original state when the save was imported would also be useful. I think the buttons could be placed in the bottom‑right corner of the interface.

[ScottehMax]

I think this one is a matter of taste. I can see utility in having the Restore button, but I don't think the Save one would be necessary if that were the case (as it is effectively saved to the active working set the second the edit is made, not when switching bases).