
The old view selector used to handle initiating keynav into pages.
That code became inactive when non-search related functionality
was moved elsewhere, and was finally removed in commit cf41f4a527
.
We still want the keynav behavior it provided, so add similar code
to overview's control manager.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4056
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2124>