devices-tile: Show also "non-removable" media
devices-tile: Show also "non-removable" media

It seems that "is_media_removable" gvfs property is not reliable
and/or applicable for devices panel: at least some USB drives show
up as non-removable.

Fixes: http://bugs.meego.com/show_bug.cgi?id=1448

meego-netbook-ux/meego-panel-devices,meego-netbook-ux/meego-panel-devices,meego-netbook-ux/meego-panel-devices