FIX: Replace text areas if edit mode is already open

Summary

The WYSIWYG editor is now also initialized correctly when editing has already begun before the editor module is initialized.

Focus

Also replace textareas if edit_mode.app has an entity at the time the module is initialized

Test Environment

Use, e.g., Cfaed's server profile + wiki and make sure that the WYSIWYG editor is opened correctly when going directly to the editing of an article form the wiki.

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• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md
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src/core/js/ext_editmode_wysiwyg_text.js

@@ -45,7 +45,7 @@ var ext_editmode_wysiwyg_text = function ($, logger, ClassicEditor, edit_mode, g
             return;
         }
 
-        try{
+        try {
             const editor = await ClassicEditor
                 .create(prop.querySelector('textarea'), {
                     // use all plugins since we built the editor dependency to
@@ -65,7 +65,7 @@ var ext_editmode_wysiwyg_text = function ($, logger, ClassicEditor, edit_mode, g
             editor.model.document.on("change:data", (e) => {
                 editor.updateSourceElement();
             });
-        } catch(error) {
+        } catch (error) {
             logger.error(error.stack);
         }
     }
@@ -82,6 +82,11 @@ var ext_editmode_wysiwyg_text = function ($, logger, ClassicEditor, edit_mode, g
     }
 
     var init = function () {
+        if (edit_mode.app && edit_mode.app.entity) {
+            // replace text areas if we're already in the edit mode and all
+            // events did fire already.
+            replaceTextAreas(edit_mode.app.entity);
+        }
 
         // Insert an editor into all TEXT properties of the entity which is
         // being edited.