Special HTML characters appear escaped in the header outline, but they shouldn't be escaped.

[awmartin]

Observed Behavior

When HTML characters (e.g.  ) appear in headers, they show up in the headers outline on the left as escaped characters.

Impact of observed behavior

Looks really weird and gives an impression of instability in the app.

Desired Behavior

Those characters should be there in the outline, but they shouldn't be escaped, they should be the character they're intended to represent.

Reproduction Steps

1. Create a header. Observe the header appearing in the outline.
2. Delete the text in the header by pressing backspace.
3. Navigate the cursor away from the header.
4. Observe the header in the outline now appearing as  

Anticipated Fix

There may be a way in Vue.js to not escape contents that are interpolated into the template during rendering.

[awmartin]