Steps to replicate the issue (include links if applicable):
- Become an IP masked user (see T326911)
- Hover over a page preview
- Click the settings cog
What happens?:
You are redirected to the login page, as IP masked users are treated as registered users and IP masked users are prohibited from having preferences.
What should have happened instead?:
We should store the preference like we do for anonymous users.
Software version (skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):