This may still work its what I did to remove global menus ... step two is to get a panel back
I have removed global menus ...... I can now use my system again .... made it easier.
sudo apt-get remove indicator-appmenu
sudo apt-get install xfce4-panel
From the run dialog (alt+f2) xfce4-panel
Also the latest firefox did the trick for me .... automatically removes global menus ....
means that I can cut+paste again ......
Remove the following packages:
Leave the following dependencies unresolved:
2) firefox recommends firefox-globalmenu