Fix unfreed managed string handles

Source/Editor/Content/Import/ModelImportEntry.cs

@@ -566,6 +566,8 @@ namespace FlaxEditor.Content.Import
             }
             internal static void Free(InternalOptionsNative unmanaged)
             {
+                ManagedString.Free(unmanaged.CollisionMeshesPrefix);
+                ManagedString.Free(unmanaged.RootNodeName);
             }
         }
 

Source/Editor/Editor.cs

@@ -1259,6 +1259,8 @@ namespace FlaxEditor
             }
             internal static void Free(VisualScriptLocalNative unmanaged)
             {
+                ManagedString.Free(unmanaged.Value);
+                ManagedString.Free(unmanaged.ValueTypeName);
             }
         }