* Add follow button to user page
* Update follows in the database using follow button.
* Add toggle for followed market creators to home
* Hide follow toggle from user's markets page
* Check that sold bet is by auth'd user
* Change follow toggle to category pill
* Remove unused imports
* Remove console.logs
* Add activity page. Copy explore page into home
* Update navbar with activity. Show explore instead if signed out.
* Move category selector into contract search
* Make algolia filter by category
* Default tag page to all filter