Unregister hotkey on app exit on Windows.

Hopefully fixes issues #68 and #69.

EDMarketConnector.py

@@ -481,6 +481,7 @@ class AppWindow:
             self.w.clipboard_append(self.station['text'] == self.STATION_UNDOCKED and self.system['text'] or '%s,%s' % (self.system['text'], self.station['text']))
 
     def onexit(self, event=None):
+        hotkeymgr.unregister()
         flightlog.close()
         if platform!='darwin' or self.w.winfo_rooty()>0:	# http://core.tcl.tk/tk/tktview/c84f660833546b1b84e7
             config.set('geometry', '+{1}+{2}'.format(*self.w.geometry().split('+')))

hotkey.py

@@ -278,6 +278,7 @@ elif platform == 'win32':
         def unregister(self):
             if self.thread:
                 PostThreadMessage(self.thread.ident, WM_QUIT, 0, 0)
+                self.thread.join()	# Wait for it to unregister hotkey and quit
             self.thread = None
 
         def worker(self, keycode, modifiers):