Added code to apply selected applicability when expanding steps while steps are being setup in SetupEditItem method

Added additonal condition to check for null value for section steps when no steps exist due to applicability settings

PROMS/Volian.Controls.Library/EditItem.cs

@@ -2367,6 +2367,7 @@ namespace Volian.Controls.Library
 				MyStepPanel.ItemMoving--;
 				LastMethodsPop();
 			}
+			this.Enabled = this.MyItemInfo.IsApplicable(MyStepPanel.ApplDisplayMode);
 			_Loading = false;
 			//// TIMING: DisplayItem.TimeIt("CSLARTB Controls Add");
 		}