Heatblade tweaks and bugfixes

Just a few fixes to the heatblades I forgot when I originally made them.

1 - Removed capitalization from shishkebab and firebrand.  Looking at all the other items, nothing else has the names capitalized, so changed these to fit.  Left No. 9 and Rising Sun as they were, because No. 9 is named after a character from Parasite Eve 2, and Rising Sun looks silly in lowercase (upper case also fits the style of the menu text).

2 - Changed No. 9 to require 4 skill instead of 5 to make.  The No. 9 isn't meant to be as high quality as the firebrand and Rising Sun, that's why it has a chance to not light on demand and go out unexpectedly.  If we want this to be skill 5, I'll take out the unreliability factor.

3 - Reduced required skill for shishkebab from 3 to 1.  The shishkebab is supposed to be very easy to make, that's why it's so unreliable (try it in game, it's a pain to start and goes out all the time).  I know it shouldn't be too easy, but for how unreliable it is 3 seems too high.

4 - Changed color of active heatblades to red.  I wanted to give these a red backround, like monsters that are on fire have, but didn't know how to do it.  If anyone can explain to me how text color works in this game, please tell me!

5 - fixed a bug spotted by yassistant that made heatblades vanish when out of fuel.

6 - New menu text for the shishkebab.  Has a punk-rock feel to match it's cobbled-together, unreliable style.

7 - Firebrand and Rising Sun still give random messages when turned on, but don't make noise when doing so.

Hope these don't seem out of line or anything, I know this is a pretty small PR.  I'm waiting to see if my zweihander makes it in #2452 before making any more heatblades.  I want to do a zweihander, but just wanted to see if people thought these tweaks were good first.