Remove Shuffle from list of actions

Shuffle is only valid from our "you have no moves left" dialog; you
shouldn't be able to shuffle at any time via D-Bus, for example.

https://bugzilla.gnome.org/show_bug.cgi?id=732225
Use reasonable response types for the no moves left dialog

https://bugzilla.gnome.org/show_bug.cgi?id=732225
Destroy "no moves left" dialog before using the result

https://bugzilla.gnome.org/show_bug.cgi?id=732225
Do not allow shuffling if it's guaranteed to fail

https://bugzilla.gnome.org/show_bug.cgi?id=732225
Redraw tiles after resetting

This didn't work when the game was shuffled. All tiles need to be redrawn
Change wrong signal around

for non-gnome-shell-environments two different menu items were connected to the same signal