🎨 Highlight non-breaking spaces as special chars in the editor
🎨 Highlight non-breaking spaces as special chars in the editor

closes https://github.com/TryGhost/Ghost/issues/9384
- add non-breaking space char to CodeMirror's default "specialChars" regex so that they are visible in the editor

TryGhost/Ghost-Admin,acburdine/Ghost-Admin,acburdine/Ghost-Admin,kevinansfield/Ghost-Admin,TryGhost/Ghost-Admin,kevinansfield/Ghost-Admin