Fix the EditItem button in debug mode so that it tells the user to select an item before pressing the button, consistent with the ItemInfo button.

PROMS/VEPROMS User Interface/frmVEPROMS.cs

@@ -2775,10 +2775,15 @@ namespace VEPROMS
 		}
 
 		private void btnEditItem_Click(object sender, EventArgs e)
+		{
+			if (tc.SelectedDisplayTabItem != null && tc.SelectedDisplayTabItem.MyStepTabPanel.SelectedEditItem != null)
 			{
 				frmPropGrid pg = new frmPropGrid(tc.SelectedDisplayTabItem.MyStepTabPanel.SelectedEditItem, "EditItem");
 				pg.Show();
 			}
+			else
+				MessageBox.Show("Select Item First", "Item not selected", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+		}
 		private void btnUpdateFormat_Click(object sender, EventArgs e)
 		{
 			UpdateFormats(null);