B2017-114 Fixed issue where PROMS was trying to adjust the location of steps on the screen when shutting down, and sometimes hanging in the process.

PROMS/Volian.Controls.Library/EditItem.cs

@@ -2393,6 +2393,7 @@ namespace Volian.Controls.Library
 		 /// </summary>
 		internal void AdjustLocation()
 		{
+			if (MyStepPanel.ShuttingDown) return;
 			if (RNORight) MoveRNO(); // This is needed when an AER is Deleted that has an RNO.
 			MoveSupInfo();		// If the current item has supplemental information, be sure its top location is that of the current item.
 			if (RNOLevel > 0 && AEREditItem != null)