updated comment for why we're tracking mouse-down mouse-up cycle in AoeActionInput

Author: dwoodruffsf

Assets/BossRoom/Scripts/Client/Game/Action/AoeActionInput.cs

@@ -20,6 +20,12 @@ public class AoeActionInput : BaseActionInput
         Camera m_Camera;
         int m_GroundLayerMask;
         Vector3 m_Origin;
+
+        //The general action system works on MouseDown events (to support Charged Actions), but that means that if we only wait for
+        //a mouse up event internally, we will fire as part of the same UI click that started the action input (meaning the user would
+        //have to drag her mouse from the button to the firing location). Tracking a mouse-down mouse-up cycle means that a user can
+        //click on the ground separately from the mouse-click that engaged the action (which also makes the UI flow equivalent to the
+        //flow from hitting a number key). 
         bool m_ReceivedMouseDownEvent;
 
         RaycastHit[] m_UpdateResult = new RaycastHit[1];