Rework injured and add rest button

[juanferrer]

• Add injured affliction (works on creatures too!)
• Add injured effects to frame in sheet
• Add strings for new injured affliction
• Show injured in sheet as blood around frame
• Automatically determine if a character is injured, incapacitated or outright dead (instant death) when receiving damage
  • Creatures become incapacitated if damage >= health
  • Creatures die if they receive damage >= health in a single attack
  • Incapacitated creatures die when taking damage (if applying damage from roll)
• Fix a bunch of race conditions in the adding/removal of afflictions
• Add rest button where injured checkbox used to be
• Fix French turn types
• Add invisible tooltip (English only for now, PRs welcome)