[Feature request] A Quit button

[w-jablonski]

In a tiling window manager like Sway, window decorations do not provide a Quit button. Also I wasn't able to get client-side-decorations to show up for mate-calc. Can we optionally provide a Quit button within the window area? Thanks

[lukefromdc]

Mate-calc has a "quit" menu item as the last (bottom) item in the "calculator" menu selectable from the menu bar

[w-jablonski]

I know it. I request here a Quit/Close button placed in the window for more convenience.