Quality of life improvements

• Display cost below Auto Buy button.
• Adjust the contrast of the knowledge bar.
• Increase delay before chat lines are expired to 10 minutes.

Bug fixes

• Fix bug where Feral Cat could get stuck after being defeated for the first time.
• Fix the direction of one tile of water in Southeast Sewer.
• Delay opening the level up interface and knowledge interface while you have a final action queued.
• Fix various typos.