Various nestor-related fixes.

app/Http/Controllers/RuleGroup/EditController.php

@@ -91,7 +91,7 @@ class EditController extends Controller
     {
         $groupId   = (int) $request->get('id');
         $ruleGroup = $this->repository->find($groupId);
-        if (null !== $ruleGroup) {
+        if ($ruleGroup instanceof RuleGroup) {
             $direction = $request->get('direction');
             if ('down' === $direction) {
                 $maxOrder = $this->repository->maxOrder();

app/Http/Controllers/RuleGroup/ExecutionController.php

@@ -24,6 +24,7 @@ declare(strict_types=1);
 
 namespace FireflyIII\Http\Controllers\RuleGroup;
 
+use Exception;
 use Carbon\Carbon;
 use FireflyIII\Http\Controllers\Controller;
 use FireflyIII\Http\Requests\SelectTransactionsRequest;
@@ -64,7 +65,7 @@ class ExecutionController extends Controller
     /**
      * Execute the given rulegroup on a set of existing transactions.
      *
-     * @throws \Exception
+     * @throws Exception
      */
     public function execute(SelectTransactionsRequest $request, RuleGroup $ruleGroup): RedirectResponse
     {