Only set a local copy of the smoke gen cmd desc to units who have it disabled.

Using the global one caused newly-built units who entered the game while
at least one ship was 'reloading' the smoke gen to have the command permanently
disabled.
* (at least partially) Fix [08:38:51] <wiremgon> you guys could probably fix my math on the outlines/stacking of multiple bars
[08:39:50] <wiremgon> I just got it to the point of "good enough" but it still kind of irritates me that things like that happen (the blue bar appears to be slightly larger and overlapping the yellow one)
* Beautify smoke screen button
Merge pull request #29 from ashdnazg/reload_gui

Added reload bar to healthbars
* Change fuel colour to orangey-brown
--rgbtool.com, finally a colour picker with decimalised values!