Resolve "search/courses lädt nicht, wenn in der URL der Parameter „cid“ steht"

Closes #4394

Merge request studip/studip!3208

lib/classes/JsonApi/Routes/Tree/ChildrenOfTreeNode.php

@@ -9,6 +9,7 @@ use JsonApi\JsonApiController;
 
 class ChildrenOfTreeNode extends JsonApiController
 {
+    protected $allowUnrecognizedParams = true;
     protected $allowedFilteringParameters = ['visible'];
 
     protected $allowedIncludePaths = [

lib/classes/JsonApi/Routes/Tree/CoursesOfTreeNode.php

@@ -11,8 +11,8 @@ use JsonApi\JsonApiController;
 
 class CoursesOfTreeNode extends JsonApiController
 {
+    protected $allowUnrecognizedParams = true;
     protected $allowedFilteringParameters = ['q', 'semester', 'semclass', 'recursive', 'ids'];
-
     protected $allowedIncludePaths = [
         'blubber-threads',
         'end-semester',

lib/classes/JsonApi/Routes/Tree/TreeShow.php

@@ -14,6 +14,7 @@ use JsonApi\JsonApiController;
 
 class TreeShow extends JsonApiController
 {
+    protected $allowUnrecognizedParams = true;
     protected $allowedIncludePaths = [
         'children',
         'courseinfo',