Combobox dropdown does not pop up in a grid if column is too short

How to replicate (e.g. in demo/All Data Types):

  1. Switch to grid view
  2. Add a new row
  3. Select an entry from a drop-down field
  4. Make the column shorter than the text which is now visible in the grid cell
  5. Try to open the dropdown again in order to select another value

The drop-down will flicker and not open (sometimes it opens on double-click). If you make the column wider than the text, it will work again.

Desired behaviour: The drop-down should always open.

I cannot reproduce this in master

Seems to be working now.