Updating indexing function to treat units in order of history instead of original battledata for compatibility with the method used in NMD.

Fixed overlapping text on armory UI

Fixed issue with armoury photobooth text overlapping (already fixed in tactical). None-checked a few other variables to assist in crash handling.

Refactored the UISL into wrapper classes to prevent a CTD when clearing up delegates

Remove UISL delegates on screen closure to prevent GC crash

Added some additional unit validity checks for the solo photobooth

Fixed an issue with the Fast Toggle switch which wasn't respecting invalid units properly and sorted out a minor indexing issue.

Fixed an indexing issue with the fast toggle button

Updated compatibility with Nice Mission Debriefing

Fixed a mouse-in camera issue
Fixed an issue where the poster banners/text wouldn't update properly when the quick toggle button was used

Issues left to sort:
1. Listen for var / button ID on NMD screen and pass into UI
2. Make the quick toggle set a random pose (doesn't seem to be working atm).