Bookmarks Drop List has a Scrollbar
Bookmarks Drop List has a Scroll Bar @ 100% UI Zoom or more, but not at 95% UI Zoom or less.
Windows Text Scaling is at 175% to offset the problem of using 100% UI Zoom to fit 5 columns of speed dials on my 1920 x 1080 monitor.
Have you altered the default fonts for UI? I don't have the scrollbar @ 100% UI Zoom, but it appears when I scale it down to 90%. I tried it on both 1.6.689.40 and 1.7.705.3 (32-bit on Win10 x64, default system DPI scaling).
@Pesala - I don't have it here at 100%.