feat(form): escaped caused maximum callstack exceeded

Whenever the escape key was pressed inside an input of a form and the validation trigger was set to blur and using jquery >= 3.4.0 the "maximum callstack exceeded" error occurs.
This is because jquery removed/changed the internal blur() handling.

By using the native .blur() instead this error is fixed

Author: lubber-de

src/definitions/behaviors/form.js

@@ -416,7 +416,7 @@ $.fn.form = function(parameters) {
               ;
               if( key == keyCode.escape) {
                 module.verbose('Escape key pressed blurring field');
-                $field
+                $field[0]
                   .blur()
                 ;
               }