Targeting units with attack commands on mouse release

[Godde]

This makes it easier to target specific units when they are on the move and especially airplanes which the default cylindrical area commands might miss entirely with a tilted camera.

[jamerlan]

Thanks for widget. I will include it in my "widgets pack" :-)

"lo license" is a little bit confusing. I think its better to use "public domain" or smth like that