Editing hyperlink text results in underlined text

**Problem:** Changing the text of a link results in `<u>` elements instead of the text being changed inside the `<a>` element.

**Steps to Reproduce:**
- Type some text
- Create a hyperlink using the editor
- Place cursor at the end of the hyperlink
- Press _BACKSPACE_
- Type new text
- This new text is wrapped in `<u>`
