Feature request: "Restart to ..." option

[No one]

I think this feature would come in handy for those of us who have several
OSs installed. Sometimes, you want to reboot your PC, go check something
elsewhere (smartphone, bathroom...), and come back to the login screen.
This is OK if you want to boot whatever GRUB has set as the default option.
But if you want another one, then you have to stay in front of the PC so
when GRUB comes up you can select it before the countdown comes to 0. This
gets tiresome if you have to keep changing between different Linuxes.

This feature would parse the entries in /boot/grub/grub.cfg, and list them
in a menu called "Restart to...", next to Shutdown, Restart, Suspend, etc.
So you could for example choose "Restart to Ubuntu 14.04 LTS" or whatever.
After rebooting, the GRUB menu would be skipped and the chosen option would
be loaded directly. This could be done writing a file in /boot/grub, with a
number or something. GRUB checks if this file exists and boots the given
option, and if not, the menu is shown as usual.
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