Buggy drop down menu for sound and wifi menu

Submitted by Corey Bruce

Assigned to Nick Schermer

Link to original bug (#12620)

Description

When elements change in drop down menus like wifi detected new wifi or more added players for music/sound or opened players the drop down menu will appear over the panel or off the panel, this has been a ongoing issue for a long time on XFCE/Xubuntu

here are screenshots (had to take them with my phone as you cant use print screen while menus are open)

http://i.imgur.com/Va088gi.jpg http://i.imgur.com/TFaCdsh.jpg

Version: 4.12.0