Improve QuickAccess window by adding buttons and showing keyboard shortcuts hints

[MurzNN]

Will be good to duplicate the keyboard shortcuts hint in the QuickAccess window, because it's totally unclear for the new users how to use this window, and even for me - always forget and have to open the Keyboard Shortcuts hint window additionally to recall.

Also, will be good to add buttons to copy username and password by mouse (right-click menu), or maybe even a hamburger menu button with all available actions, something like this maybe?