v1.0.22 Bug Fixes, Stun Time Balance, and Improving Ease of Use

Fix

1. fix a bug introduced from an earlier patch for GameLevel "Apartments" which prevented players from entering a building (a ceiling was too low)
2. fix kill volume (falling from board bridges between buildings in GameLevel "Apartments" kills players)

Balance

1. increase duration of all mini-stuns (hitting zombies will stun them for longer)

Other

1. add ease-of-use feature: players can press any key to transition through message screens with "continue" button
2. add red flash animation if CreateNewGame button is pressed while SaveSlotName is empty
3. add building material icons to building material thumbnails