Input Mappings will expand collapsed categories when modified

1. Open IMC_Default in Lyra
2. Select "Collapse All" to collapse everything
3. Expand "IA_Weapon_Reload" 
4. Add a new key mapping

Result: IA_Move, IA_Weapon_Fire, IA_AutoRun, and IA_LookStick all get expanded even though you never clicked on them

Expected: the expansion/collapsed state of the key mappings is preserved while you modify key mappings.

This also occurs when you delete an Input action from a mapping context, or otherwise modify any properties in it. 

See lyra_expansion_bug.gif