gs-installed-page: Improve handling of pending install/remove apps
The Installed page hides apps set as pending-install/pending-remove, but these can be shown as In Progress, because they usually wait for a reboot to be considered in the system.
The Installed page hides apps set as pending-install/pending-remove, but these can be shown as In Progress, because they usually wait for a reboot to be considered in the system.