allow to activate/deactivate the progress indicator on task bar entry
Summary:
the Elisa application menu has an entry to activate or deactivate the
reporting of progress on the task bar entry (currently supported on
Plasma, Windows and linux environments supporting
com.canonical.Unity.LauncherEntry .
BUG: 406454
Test Plan: One can activate or deactive the progress reporting
Reviewers: Elisa, ngraham
Differential Revision: https://phabricator.kde.org/D20636