Fixed bug that would cause the delete buttons to be unfunctional

@RGrid/delete_g1s.m

@@ -17,7 +17,7 @@ for i=1:size(object.Cells,2)
     end
 end
 if(~isempty(deleted))
-    delete(object.Cells(deleted).result);
+    delete([object.Cells(deleted).result]);
     object.Cells(deleted) = [];
 end
 end

@RGrid/delete_g2s.m

@@ -20,7 +20,7 @@ for i=1:size(object.Cells,2)
     end
 end
 if(~isempty(deleted))
-    delete(object.Cells(deleted).result);
+    delete([object.Cells(deleted).result]);
     object.Cells(deleted) = [];
 end
 end