🐝  Refresh publication icon after upload (#626)
🐝  Refresh publication icon after upload (#626)

refs TryGhost/Ghost#7688
- Instead of using a hardcoded `favicon.ico` URL to request the blog/publication icon, we read the settings which get updated as soon as a icon is uploaded.
kevinansfield/Ghost-Admin,JohnONolan/Ghost-Admin,JohnONolan/Ghost-Admin,TryGhost/Ghost-Admin,acburdine/Ghost-Admin,acburdine/Ghost-Admin,TryGhost/Ghost-Admin,kevinansfield/Ghost-Admin