A Minor Update

This minor update does only a couple things: it ties the colour from the Thruster Power Level slider to both the thruster's bell, as well as the thrusters light-effect. I found that I was often changing my power-level without realizing it... Now, with this instant visual feedback to the power-level you've selected, you won't be caught off-guard when you suddenly have a lot more (or a lot less) thruster power.