* gdesktop.c (do_mount_umount): Use g_readlink here.
* gpopup2.c (handle_eject): Small tuning. And use g_readlink :-).
* gmount.c (mount_point_to_device): New function. Mapes a mount
point to its device. Required since we are now using the mount
point (as this is not ambiguous) as the key for the devices and
the eject command needs the device name, not the mount point.
* gdesktop.c (desktop_icon_info_open): First try to see if
filename is mountable. Then do the directory tests and the file
launching tests. Fixes mount-by-double click.
* gmount.c (setup_devices): Use new tigert icon.
