Hot key for Building Mining Base (Asteroid).

It would be nice to add hot to build Mining Base when you have an asteroid selected.

"B" would be the logical choice.

While were at it a key-stroke to bring up the "Command" menu and all the rest of the options as well please. Since some of them already have key strokes I assume you have the code already in there for menu to have keystrokes, so it should be minor to add the other menu options with keystrokes.