Feature: CTRL/CMD + Q closes the mainwindow

[YoshiMan]

As a user of QtPass
i want to quit the application with a keyboard shortcut,
so that i dont have to use the mouse on move it all round the screen
and save a little bit time ;).

You already can close dialogs with ESC.

Given the mainwindow is focused
When CTRL/CMD+Q is pressed
Then the QtPass application closes.

Given any dialog is focused
When CTRL/CMD+Q is pressed
Then nothing happens.