Search: Enhanced to Search Other Collections

__Publicly Searchable flag added to Collections:__
* Defaults to false for all existing collections.
* Defaults to true for all new collections (added in future.)
* Special override to true for any existing Cosmos collection.

UI changes were also made so this flag is editable with a checkbox when editing your collection's settings. (Same panel as when granting permissions to other users.)

__Scope added to search:__
* Current Collection (same as existing)
* All My Collections (new)
* All Publicly Searchable Collections (new)

If search result selected is in current collection, user has a visual zoom from current location in collection to where search result resides. (Existing behavior.)

If search result is in a different collection, user is taken straight to the search result. (New behavior.)

*Note on merging:
Was unable to merge a minified CSS file but I regenerated this from the source file.*