Shift-Space should open new window

Unity allows you to Shift + Space on any window to maximize them, and you don't have to have that window active - just hovering over it activates the shortcut. So this way it collides with MapMagic's spacebar shortcut. Would it be possible to either detect the spacebar when it's pressed without shift or only when mouse is over MM Graph, which would also make more sense because it could create the node on the position the cursor is?