Issue #3283735: Workspace config: Wrong array concatenation in listAll() and getAllCollectionNames() of storage

modules/wse_config/src/WseConfigDatabaseStorage.php

@@ -283,7 +283,7 @@ class WseConfigDatabaseStorage implements StorageInterface {
 
       // Add configs which were not saved into wse_config entities yet or that
       // are ignored from the inner storage.
-      $configs += $this->inner->listAll($prefix);
+      $configs = array_merge($this->inner->listAll($prefix), $configs);
       return $configs;
     }
     catch (\Exception $e) {
@@ -366,7 +366,7 @@ class WseConfigDatabaseStorage implements StorageInterface {
         }
       }
 
-      $collections += $this->inner->getAllCollectionNames();
+      $collections = array_merge($this->inner->getAllCollectionNames(), $collections);
       return $collections;
     }
     catch (\Exception $e) {