Sometimes the bottom toolbar of the popup panel is pushed to the right

[jspenguin2017]

When the overview panel scrolls, sometimes the bottom toolbar is pushed to the right. This is not an issue for uBO because it only has a maximum of 5 buttons in one toolbar (Nano has 6 buttons in the bottom toolbar).

To reproduce:

1. Enable advanced users mode
2. Go to https://www.wenxuecity.com/news/2020/06/02/9526348.html
3. Open the popup panel
4. Click + all

One weird thing is that I can only reproduce this issue on specific pages. For example, the overview panel scrolls on https://www.wsj.com/ but the toolbar is not pushed in.