[PATCH] Filter out bogus MapStatus mouse events

[markb@…]

When an AWTEventListener is being used by the MapStatus code it is rather
promiscuous in that it will accept events from any source component rather
than just the MapView. The upshot of that is that the map status is updated
when the mouse is near an entity on the map even if a dialog or button is
obscuring the map at that point. This patch fixes the problem by only using events whose source is the MapView. Now you don't get that annoying visual distraction
when you move the mouse over the non-map parts of the main window.

[anonymous]

Applied in r1258.