Make in settings the ability to add the terminal window to the right screen

I use 2 monitors and the main is on the right, really like the guake terminal, but I need it to be on the rightmost monitor. I managed to fix this :), coz I found [this](http://brightbyte.de/page/Guake_on_the_right_screen), Maybe it will be a good idea to implement it as a settings variable.