Fix wiris plugin, adding ckeditor plugin requirements see BT#15411

src/Chamilo/CoreBundle/Component/Editor/CkEditor/Toolbar/Basic.php

@@ -113,6 +113,11 @@ class Basic extends Toolbar
         }
 
         if (api_get_setting('enabled_wiris') == 'true') {
+            // New version of wiris needs this plugins before it's loaded
+            $plugins[] = 'mapping';
+            $plugins[] = 'widgetselection';
+            $plugins[] = 'panelbutton';
+
             // Commercial plugin
             $plugins[] = 'ckeditor_wiris';
         }
@@ -133,7 +138,8 @@ class Basic extends Toolbar
             $plugins[] = 'scayt';
         }
 
-        $this->defaultPlugins = array_merge($this->defaultPlugins, $plugins);
+        $this->defaultPlugins = array_unique(array_merge($this->defaultPlugins, $plugins));
+
         parent::__construct($toolbar, $config, $prefix);
     }