Refactored app service providers

Removed old pagination provider as url handling now achieved in a better
way.
Removed unused broadcast service provider.
Moved view-based tweaks into specific provider.
Reorganised provider config list.

app/Providers/ViewTweaksServiceProvider.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace BookStack\Providers;
+
+use BookStack\Entities\BreadcrumbsViewComposer;
+use Illuminate\Pagination\Paginator;
+use Illuminate\Support\Facades\Blade;
+use Illuminate\Support\Facades\View;
+use Illuminate\Support\ServiceProvider;
+
+class ViewTweaksServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        // Set paginator to use bootstrap-style pagination
+        Paginator::useBootstrap();
+
+        // View Composers
+        View::composer('entities.breadcrumbs', BreadcrumbsViewComposer::class);
+
+        // Custom blade view directives
+        Blade::directive('icon', function ($expression) {
+            return "<?php echo icon($expression); ?>";
+        });
+    }
+}