* Allow marking bookmarks as shared
* Add basic share view
* Ensure tag names in tag cloud are unique
* Filter shared bookmarks by user
* Add link for filtering by user
* Prevent n+1 queries when rendering bookmark list
* Prevent empty query params in return URL
* Fix user select template tag name
* Create shared bookmarks through API
* List shared bookmarks through API
* Show bookmark suggestions for shared view
* Show unique tags in search suggestions
* Sort user options
* Add bookmark sharing feature flag
* Add test for share setting default
* Simplify settings view
