Mixing submenu menuitems and toggle menuitems results in poor layout.
The fix is to right-align the submenu arrows. Since we already need to
right-align the battery percentages as well, add alignment support to
PopupBaseMenuItem.addActor(), and update stuff for that.
Also remove the "column" param from addActor() since it hadn't
actually been implemented correctly before.
https://bugzilla.gnome.org/show_bug.cgi?id=633476
We updated the normal devices part, but we forgot the part about
the primary device (possibly because it is not reported as such
in case it is fully charged). Update that as well, to avoid showing
weird GIcon serializations.
https://bugzilla.gnome.org/show_bug.cgi?id=635288
