[Bug 55573] Help function can't carry out

[bstqc_ostl]

Public bug reported:

1.Add modem monitor button to panel; 
2.Right key click this button ,choose help in the shortcut memu,it has no response. 
Shared Folders and help content in GIMP Image Editor have the same problem.

** Affects: gnome-applets (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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Help function can't carry out 
https://launchpad.net/bugs/55573