I now know for sure that it's fixed. I have added a lot more music in the past five (almost six) months. All I did was open Apple Music to my playlist. Choose the playlist I want, go to the "pause" click it and choose "open in a new window". The grey sidebar is gone. I had it figured out a long time ago, I just wanted to be sure it was fixed. I would like to remove the top "wasted space". Apparently, it can be done, but how can I easily export the list I only play from the day after Thanksgiving to December 31st and the list I only play one day of the year. (It's basically a celebration playlist. Celebrating one day.)