Remove launchers in camouflage mode

If one opens the application, then there an icon for the launcher and the same one for the open application. This can’t happen in windows, so it has been decided on tails-dev that the launchers sould be dropped.

Feature Branch: bugfix/7381-remove-launchers

Parent Task: #6342 (closed)

Original created by @alant on 7381 (Redmine)