Created attachment 1103561 [details]
screenshot01.jpg

Description of problem:
1.In gnome-system-monitor user can open infinite number of context menus, which cannot be closed until super is pressed, afterwards all context menus could be closed by user. 
2.It can even "freeze" gnome when you try to use context menu normally (clicking on any button in context menu), pressing super key and going to windows overview is solving the problem and all context menus can be closed only there.

For more info check screenshots.

Version-Release number of selected component (if applicable):
gnome-system-monitor-3.14.1-3.el7.x86_64
kernel-3.10.0-327.el7.x86_64


How reproducible:
always

Steps to Reproduce:
1.open gnome-system-monitor
2.right-click anywhere inside window(except top panel)
3.right-click anywhere on the top panel of the window
4.right-click somewhere else on the top to open another one
5.left click on any item(e.g. minimize) in menu(freeze)
6. press super key
7. close all created context windows

Actual results:
few context menus are created and stuck on the screen on all workspaces and user cannot close them until pressing super and going to window overview. After closing all context menus there, message System monitor is not responding is shown.


Expected results:
only one context menu should be shown at the time, context window should be closed normally after clicking on items inside.


Additional info: