Allow overloading of shortcuts (action should be sent after keys are released)

Submitted by Yan Pas

Assigned to Xfce Bug Triage

Link to original bug (#12473)

Description

Steps to reproduce:

1. Set kb layout change with shortcut Ctrl+Shift
2. You are unable to list tabs backwards in browser (Ctrl+Shift+Tab) You are unable to paste text to terminal Ctrl+Shift+V etc.

STR 2:

1. Set shortcut for poping up whisker menu as Win key
2. Set shortcut for opening notepad Win + E
3. Press Win+E : Whisker popped up and notepad is opened!

Please fix!

Version: 4.12.1