In AZ Controller (see my signature) can do focusing (absolute, relative, remembered, by strip name, etc.).
Just note there is a difference between "focused" and "selected" strips. "Focused" can be only one strip per type, so one Track and one Bus. The track inspector always shows focused strip from "current" strip type.
Selected tracks means selected content in tracks. But selection is also used for group operations with strips (normally with Ctrl key).
Control surfaces can "focus" strips but can not select them (except generating "," key to select focused strip, unfortunately not working correctly in that context since track focusing by mouse/keyboard is decoupled with track focusing by surface (a bug in Sonar) and so you sometimes select something unexpected).