Copy/Paste not possible in the Find and Replace widget

[aupfred]

Reported by Bill in the abcuser list:

When using for instance the find & replace widget, copy and paste will not change in the widget but in the editor

Analysis:
In the event management of the shortcut and main menu, all those events are sent to the editor, regardless the focus is on editor.

Need to change to first find which widget has the focus and then use the copy paste feature of this widget.
To be done for the other actions also as it can introduce errors.