Make the "restore" button functional

[Crystalwarrior]

It should reset to the default window size (or imported theme size if defined)

[Crystalwarrior]

And maybe make your own button in the menu bar for this as well cuz I think this might be platform-specific?

[SyntaxNyah]

And maybe make your own button in the menu bar for this as well cuz I think this might be platform-specific?

That would probably be the better approach so other builds don't end up getting a feature that's broken. But yeah this can be looked into at some point.