Re-enable removing combatants.
Store all combatants in observable collections.
Remove last vestigates of Traps.
Minor perf tweaks while adding or removing large sets of combatants.
Add Encounter persistence and display.
Add DockPanel layout persistence.
Change Damage from string to discrete object.
Update statblock rendering to account for above.
Cleanup Library persistence.
Turn off Library dirty checking.  Too many missed edge cases.