Revamped some complex queries, added favourites to home

- Removed old view system and started use of new query classes instead.
- Finished off RelationMultiModelQuery but found it was less efficient
than x-many queries due to the amount of tables being scanned.
Adding now for history but will delete as not used.
- Updated recently viewed to use same query system as popular items
  rather than running and joining x-entities queries.
- Added "Most Viewed Faviourites" listing to homepages.

app/Http/Controllers/SearchController.php

@@ -1,6 +1,7 @@
 <?php namespace BookStack\Http\Controllers;
 
 use BookStack\Actions\ViewService;
+use BookStack\Entities\Queries\Popular;
 use BookStack\Entities\Tools\SearchRunner;
 use BookStack\Entities\Tools\ShelfContext;
 use BookStack\Entities\Tools\SearchOptions;
@@ -82,7 +83,7 @@ class SearchController extends Controller
             $searchTerm .= ' {type:'. implode('|', $entityTypes) .'}';
             $entities = $this->searchRunner->searchEntities(SearchOptions::fromString($searchTerm), 'all', 1, 20, $permission)['results'];
         } else {
-            $entities = $this->viewService->getPopular(20, 0, $entityTypes, $permission);
+            $entities = (new Popular)->run(20, 0, $entityTypes, $permission);
         }
 
         return view('search.entity-ajax-list', ['entities' => $entities]);