Fix frontend crash when rapidly aborting many active video encodings. Fixes
bug #595
Use light gray color for volume change, just like for the auto camera msgs
The idea is that these are "local" messages for local changes
Use full string for sidFuel and avoid string concatenation
Fuel as in fuel for saucer, landgun, flamethrower, icegun.
Old string was built with like this:
sidFuel + ": " + fuel + "%".
New string us built with proper format string instead
Fix attack bar render bugs: Invisible beyond world edge; rendered over GUI (e.g. mission panel)
Fix foreground flakes (layer 2+6) disappearing when moving camera in world wrap world
Fix hard-to-read text on campaign and training page in frontend at October 31
The text was yellow against a white background (the moon in the Halloween background).
This is fixed by darkening the critical area.