Don't open tabs when double- or middle-clicking notebook arrows
Don't open tabs when double- or middle-clicking notebook arrows

We need to connect after the button-press-event to make sure that
GtkNotebook blocks the signal appropriately.

Double click is disabled for now since we can't figure out if
it was a click on a button or not.

OoberMick/Midori,OoberMick/Midori