Added comment to make sure that the code is deleted when IE8 support is dropped

Author: koenweyn

src/run/formlyNgModelAttrsManipulator.js

@@ -127,6 +127,8 @@ function addFormlyNgModelAttrsManipulator(formlyConfig, $interpolate, formlyWarn
     try {
       return node.querySelectorAll(query);
     } catch (e) {
+      //this code is needed for IE8, as it does not support the CSS3 ':not' selector
+      //it should be removed when IE8 support is dropped
       return getNgModelNodesFallback(node, skip);
     }
   }