[FIX] web_editor: Expose focus method for activate method of html field

closes odoo/odoo#31577

Signed-off-by: VincentSchippefilt <VincentSchippefilt@users.noreply.github.com>

addons/web_editor/static/src/js/wysiwyg/root.js

@@ -8,7 +8,7 @@ var assetsLoaded = false;
 var WysiwygRoot = Widget.extend({
     assetLibs: ['web_editor.compiled_assets_wysiwyg'],
 
-    publicMethods: ['isDirty', 'save', 'getValue', 'setValue', 'getEditable', 'on', 'trigger'],
+    publicMethods: ['isDirty', 'save', 'getValue', 'setValue', 'getEditable', 'on', 'trigger', 'focus'],
 
     /**
      *   @see 'web_editor.wysiwyg' module