vanishing, like with e_shelf_locked_set. gadcon providers set their own lock
function with e_gadcon_util_lock_func_set, which is called by
e_gadcon_locked_set.
SVN revision: 38759
It's nasty to have shelf auto-hided when you have a popup like mixer
or battery warning, so gadcon popups will now lock shelf while they're
visible.
Developers can go back to old behaviour setting the appropriate flag
with e_gadcon_popup_shelf_lock_set().
SVN revision: 38530