Feature Request: Close Window Button

[Countryen]

Maybe this is a silly question but what about adding a little X to close the window button?

I understand that the window automatically closes when losing focus but this is odd behaviour for me, I'd rather close it with a simple "X"-Button (like all other things).

Also, when using the pinning you can't unpin it seems. Only way to close then is to use the ESCAPE keyboard button - which is inconvenient if only using mouse.

So please add a X/Close button (could be optional with an extra setting, of course).