Add a new route
"valueA", "valueB", ...
- This route can only be used by tracker administrators and upper (project admin, etc)
- It only works on tracker that are active in active projects
- It only works on "selectbox" like fields (selectbox, multi-select box, radio, checkboxes)
- It only works on list fields bound to static list of values
- It can only add new values (without color decorators)