FR: HUD lock counters

With multilock it is possible to create weapons where the current and potential number of locks can be hard for the pilot to keep track of. Displaying this information in the HUD would thus be helpful. This could take multiple forms, and it might be ideal to have all of them available
* Lock count numeral by target ship. In this way when stacking locks on multiple targets you can know the state of them accurately
* Rotational offset or randomization for HUD lock graphics for subsequent locks. Effectively similar to the lock count, just communicated differently
* Potential lock/acquired lock counts. Could be located in the missiles panel or near the center of the hod, like by the weapon energy bank display. Good for missiles that can pick up many different targets at once

Since the best solution is situational depending on the missile's configuration, in my ideal world they would be controlled by weapon tables values.