Handle display does not match acutal handles

[onno74]

In self.show_handles we have

if self.show_handles:
            dx = (r - l) / 3
            dy = (b - t) / 3

versus

def classify(self, x, y):
        t, l, r, b = self.get_screencorners()
        dx = (r - l) / 4
        dy = (b - t) / 4

Please adjust to the same number, either both 3 or both 4
Otherwise the displayed handles are larger than the region where you can actually grab them.