Let me make a note to take a look. It might work in the upper right of the screen - I think there could be enough space there, above the "laid in course" widget. What to do if there are too many flagged items, though - a scrolling list would be awkward there. Having the icon on the left might feel awkward, too, if it's on the right of the screen. Basically: seems like it could be good, but UI things.