Reload list of wallpaper types on install/uninstall
Summary: As requested in D12041.
Test Plan:
Opened dialog
With kpackagetool installed an awesome wallpaper that showed some fireworks
Combo box updated immediately
Uninstalled
Combobox updated
Reviewers: Plasma, apol
Reviewed By: apol
Subscribers: Zren, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D15178