Upgrade Fomantic-UI to 2.9.4-beta.20 (#2134)

Author: mvorisek

docs/form.md

@@ -810,14 +810,14 @@ $form->addControl('phone3');
 $form->addControl('phone4');
 
 $form->setControlsDisplayRules([
-    'phone2' => ['phone1' => 'empty'],
-    'phone3' => ['phone1' => 'empty', 'phone2' => 'empty'],
-    'phone4' => ['phone1' => 'empty', 'phone2' => 'empty', 'phone3' => 'empty'],
+    'phone2' => ['phone1' => 'notEmpty'],
+    'phone3' => ['phone1' => 'notEmpty', 'phone2' => 'notEmpty'],
+    'phone4' => ['phone1' => 'notEmpty', 'phone2' => 'notEmpty', 'phone3' => 'notEmpty'],
 ]);
 ```
 
-The only catch here is that "empty" means "not empty". ATK UI relies on rules defined by Fomantic-UI
-https://fomantic-ui.com/behaviors/form.html, so you can use any of the conditions there.
+ATK UI relies on rules defined by Fomantic-UI https://fomantic-ui.com/behaviors/form.html,
+so you can use any of the conditions there.
 
 Here is a more advanced example:
 

js/src/services/form.service.js

@@ -25,7 +25,6 @@ class FormService {
             {
                 rules: $.extend(true, {}, $.fn.form.settings.rules, {
                     rules: {
-                        notEmpty: $.fn.form.settings.rules.empty,
                         isVisible: this.isVisible,
                         isEqual: this.isEqual,
                     },