0.8.5.1 bugfix... there's always SOMETHING — Mysterious Space Steam update #1046208

I got a crash report from a mysteerrrrious player (thanks, mysterious player!) it took me a little bit to figure out what was going on, but finally discovered a crash that would happen consistently when trying to change equipment when playing as the Heavy Head of Hydrus. the missing "Shield" slot was confusing the new equipment screen. I also took this opportunity to fix something I'd forgotten to fix earlier: now, any ship part that cannot be equipped is now listed in your Inventory tab. this allows people playing as the Heavy Head of Hydrus to actually be able to see and drop any shields they've picked up! sorry I didn't do this earlier. I know it's been a long-standing issue, I just test so often as the default ship; it's easy to forget about the others... thanks for reading, thanks for playing, and thanks for reporting crashes! :) that bug could have gone unnoticed for a long time wi...