No Possibility to Enlarge the FX/Track/Etc MediaBay List Window?

Usually you could drag the edges of it to enlarge / shrink, but not in N13.

Only dividers work, but no shrink / enlarge.

The normal media bay window (F5) I can resize like I need it.
Which window do you mean?

The F5 is just fine.

I am talking about those smaller windows that you summon from your Track Presets, FX Presets, etc.