fix secondary order of dashboard listings

Author: iszmais

components/ILIAS/Dashboard/Block/classes/class.ilDashboardBlockGUI.php

@@ -594,17 +594,23 @@ public function getItemGroups(): array
                 $data = $this->getData();
                 $data = array_merge(...array_values($data));
                 $data = $this->sortByTitle($data);
-                return ['' => $data];
+                $groups = ['' => $data];
+                break;
             case ilPDSelectedItemsBlockConstants::SORT_BY_START_DATE:
-                return $this->groupItemsByStartDate();
+                $groups = $this->groupItemsByStartDate();
+                break;
             case ilPDSelectedItemsBlockConstants::SORT_BY_TYPE:
-                return $this->groupItemsByType();
+                $groups = $this->groupItemsByType();
+                break;
             case ilPDSelectedItemsBlockConstants::SORT_MANUALLY:
-                return ['' => $this->sortManually($this->getData())];
+                $groups = ['' => $this->sortManually($this->getData())];
+                break;
             case ilPDSelectedItemsBlockConstants::SORT_BY_LOCATION:
             default:
-                return $this->groupItemsByLocation();
+                $groups = $this->groupItemsByLocation();
         }
+        ksort($groups, SORT_NATURAL);
+        return $groups;
     }
 
     public function addToDeskObject(): void