[Kicker] Hide "Edit Applications..." context menu entry if system immutable

Authored by broulik on Dec 12 2016, 9:03 AM.

Description

[Kicker] Hide "Edit Applications..." context menu entry if system immutable

We don't want users in a locked-down environment to mess with applications.
This makes it consistent with Kickoff.

Differential Revision: https://phabricator.kde.org/D3615