We're disabling grouped results on recent changes and would like to have a way to let users know the functionality is missing
== Acceptance Criteria
-----COPY FOR NOTICE-----
Copy: "Unfortunately, grouping results by page is not available in Advanced mode. If you would like to use the group by page feature, please visit the desktop site."
 Show on the Minerva skin for users who have the "grouped" view preference turned on, or when there `enhanced=1` URL param is present.
 Banner should not show on Vector
= Developer notes
To do this we'll need to make use of a hook (the special page is defined in core) and only add it for Minerva skin.
The existing hook function onSpecialPageBeforeExecute inside Minerva is probably the best place to add this although will give us limited control over where the banner goes (it places it after the title).
@alexhollender will need to confirm location is okay: