Fixes mods not allowing multiple spritesheets - other misc. fixes

- Thanks to the following community members for reporting issues or making suggestions included in this update!

• Blood Spartan
  
• Vivid Empress
  
• MrMarblz
  

- Quality of Life: Speed up target_kind

- fix: Prevent choosing calamities that you've already chosen
- fix: Protect against unit being loaded in with null stamina
- fix: Spell displace sometimes pushing enemies into walls
- fix: Keep perks fresh when user is selecting multiple
perks on one level, which can happen if player is joining a game late.
- fix: Perk labeling
- Fix: calamities not being given after you run out of spell upgrades

- UX: Don't show player thoughts when hovering over non-game space such as inventory or toolbar.
- mod: export cards/util to API
- mod: mod loading bug where only one mod with a spritesheet could be loaded or else it would error out