[LauncherTasksModel] Emit dataChanged for LauncherUrlWithoutIcon on sycoca…

Authored by broulik on Jul 24 2017, 12:44 PM.

Description

[LauncherTasksModel] Emit dataChanged for LauncherUrlWithoutIcon on sycoca change

This is done in XWindowTasksModel and WaylandTasksModel but was forgotten in LauncherTasksModel.

Differential Revision: https://phabricator.kde.org/D6869