[Feature request] Quit shortcut/button

[Petemir]

Is your feature request related to a problem? Please describe.
I am currently using a tiling windows manager (i3), which leaves me without window borders, thus no way to close the application

Describe the solution you'd like
I think there are two possible solutions. Most of the applications use the shortcut Ctrl+q as a way to quit. The other one is to have a quit option in the hamburger menu.

Thanks!

[Petemir]

I see here that the Ctrl+q shortcut is currently hardcoded, yet it doesn't seem to work in my setup :(.