Use Nuvola.get_app_icon() for web app desktop file

Instead of hard-coded name.

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Fix app runner path in debug_app_runner_join()

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Port Unity launcher to be a LauncherComponent

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Add gtk-update-icon-cache to system hooks

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Rename unity_quick_list.vala to unity-launcher

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>