misc: fix ckeditor monkeypatch to keep widget attributes (#20974)

combo/monkeypatch.py

@@ -28,6 +28,8 @@ def ckeditor_render(self, name, value, attrs=None):
     if value is None:
         value = ''
     final_attrs = {'name': name}
+    if getattr(self, 'attrs', None):
+        final_attrs.update(self.attrs)
     if attrs:
         final_attrs.update(attrs)
     if 'filebrowserUploadUrl' not in self.config: