MDL-76440 editor_tiny: Add directionality plugins to toolbar

lib/editor/tiny/amd/src/editor.js

@@ -25,7 +25,7 @@ import Pending from 'core/pending';
 import {getDefaultConfiguration} from './defaults';
 import {getTinyMCE, baseUrl} from './loader';
 import * as Options from './options';
-import {addToolbarButton, addToolbarSection} from './utils';
+import {addToolbarButton, addToolbarButtons, addToolbarSection} from './utils';
 
 /**
  * Storage for the TinyMCE instances on the page.
@@ -250,6 +250,10 @@ const getStandardConfig = (target, tinyMCE, options, plugins) => {
     config.toolbar = addToolbarSection(config.toolbar, 'content', 'formatting', true);
     config.toolbar = addToolbarButton(config.toolbar, 'content', 'link');
 
+    // Add directionality plugins, always.
+    config.toolbar = addToolbarSection(config.toolbar, 'directionality', 'alignment', true);
+    config.toolbar = addToolbarButtons(config.toolbar, 'directionality', ['ltr', 'rtl']);
+
     return config;
 };