Centralised handling of permission form data to own class

Also updates show roles on permission view to just those with
permissions applied.
Fixes rounded borders for lone permission rows.
Moves "Everyone Else" handling from role to new class.

app/Http/Controllers/PermissionsController.php

@@ -2,6 +2,7 @@
 
 namespace BookStack\Http\Controllers;
 
+use BookStack\Auth\Permissions\PermissionFormData;
 use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Bookshelf;
 use BookStack\Entities\Models\Chapter;
@@ -28,6 +29,7 @@ class PermissionsController extends Controller
 
         return view('pages.permissions', [
             'page' => $page,
+            'data' => new PermissionFormData($page),
         ]);
     }
 
@@ -56,6 +58,7 @@ class PermissionsController extends Controller
 
         return view('chapters.permissions', [
             'chapter' => $chapter,
+            'data' => new PermissionFormData($chapter),
         ]);
     }
 
@@ -84,6 +87,7 @@ class PermissionsController extends Controller
 
         return view('books.permissions', [
             'book' => $book,
+            'data' => new PermissionFormData($book),
         ]);
     }
 
@@ -112,6 +116,7 @@ class PermissionsController extends Controller
 
         return view('shelves.permissions', [
             'shelf' => $shelf,
+            'data' => new PermissionFormData($shelf),
         ]);
     }