Attachment name is not render correctly in edit mode.

Description

When attachment with Chinese or Korean character and is uploaded to a confluence page. The attachment name is not rendered correctly in page edit mode. The name is rendered correctly in view page mode.

Steps to reproduce

1. Create a confluence page
2. Upload the following attachment with Chinese character in the attachment name
3. You will notice the attachment name is rendered as boxes in edit mode
4. Save the page and you will notice the character is rendered correctly in view mode.

Expected Result
The attachment name is rendered correctly in edit mode as well

Actual Result
Edit mode

View page mode