more_actions.js prevents form submit if there is a form embeded in CKEditor

Steps to reproduce

1. Install webforms module
2. Create a simple webform with a required field
3. Enable webform button in CKEditor
4. Create a node and embed a webform in CKEditor
5. Hit "Save" button

A node should be saved, but instead e.preventDefault() is triggered and focus is switched to webform element within CKEditor.