Detach the map widget.

Make the HUD the center widget in Flight view and add menu item for the map widget. 

this also  permit to use the map in other view  : 
![2014-05-06-083224_1888x1019_scrot](https://cloud.githubusercontent.com/assets/1732355/2886550/3ed5bc0a-d4e8-11e3-851c-3dcfae866877.png)

this may be changed to primary flight display , see 
https://github.com/mavlink/qgroundcontrol/issues/579#issuecomment-45981647