Options page; Mouse controls

[Joseph Anton-Meehan]

"Fire: Left Click" "Aiming: Right"

"Right" should be "Right Click" or "Right Mouse Button" the same as Left Click.

Sensitivity also does not get written to a config after exiting the game therefore it is not saved, however this has already been documented.

See screenshot below; http://img.2spook.5you.globius.org/2015-07-25_16-29-29.png

[James Wright]

Typo fixed, thanks for spotting it.

[James Wright]

Duplicate of #94.

[James Wright]

Marked as duplicate only because of the sensitivity part :)