Of course. Steps to reproduce: 1. Remove all the tracks fro…

Of course.
Steps to reproduce:
1. Remove all the tracks from the playlist.
2. Click on the Video Actions icon (top right of a video).
3. Click "Add to Playlist". This will open the playlist pop-up window.
4. Click "History" (on the playlist history window).
5. Click the "+" icon of a video that you (also) want to add to the playlist.
6. Press the "Play" button on the playlist pop-up window.

RESULT: the playlist gets very narrow in height.