When clicking a category name in the measure detail breadcrumb, users should be taken back to the measures list with that category filtered. Previously, the breadcrumb linked to a route that wasn't read by the measures page.
Changed the breadcrumb to use a ?category search param instead of a route segment, and updated the measures page to initialize and sync its category filter from the URL. Removed the now-unused category/:categoryId route.
Signed-off-by: Bryan Frimin <bryan@getprobo.com>