That didn't work, unfortunately. I tried to modify the SceneMap.yml to use another windowskin (as you said) long time ago but it still there. The setting was correct but it didn't work, like it was something else. But when I removed the SceneMap.yml from luna folder, the dotdotdot disappeared. But if I remove that file from luna folder, the game won't run on Android because it'll say that file is missing.
The only solution I came up with is to change the default Windowskin because that removed the dots. But it also remove the dots from appearing on wherever it should be.