Fix style issues, such as indentation and == → ===. Simplify getTermsForSearchString() by removing one variable. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1667>
Rename ViewSelector to SearchController, since ViewSelector now effectively only handles search. Rename the file correspondingly as well. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1667>