Summary
Users have requested that we add a link to XTools for a given user in the menu for the UserInfoCard feature
Technical notes
We should add a config flag for "wgCheckUserUserInfoCardShowXToolsLink", and set this to true for WMF wikis, but false by default.
Acceptance criteria
- "View XTools" appears and links to https://xtools.wmcloud.org/ec/{project}/{username}