Add "Mount weapon (Hold)" keybind

[VoyoMayPL]

This will allow ppl to either have manual mounting [Mount weapon (Toggle) - B] or to have it automatic [Mount weapon (Hold) - RMB].
Just more ways to customize controls.

[Ron_McKracker]

If I were to go to a window and hold RMB, would the bipod automatically set up?

[VoyoMayPL]

Yes