Empty model handling reworked, prediction error counting fix, icons for new TF2 maps
Commit 5bca5b on main reworks how 0-byte model files are handled ("Change where it bails so maybe its less error prone?"), fixes prediction error counting for certain fields and adds icons for the 5 new TF2 maps.
The empty model fix also reached the x86-64 beta separately in commit 7e5aa8, together with the earlier "Handle 0 byte model files crashing the game" change.