The cursor on the emoji categories dialog is changed through moving mouse cursor on it though, moving the cursor with keyboard doesn't follow it.
Steps to Reproduce:
1.Press Super+period and space to show the categories dialog
2.move the cursor through mouse to somewhere else
3.press down-arrow key
The cursor moves down where it initially pointed at. i.e. 2nd item at the list in this case.
The cursor should moves down where the mouse cursor pointed at the list. e.g. if it points to 4th item after step 2, the cursor should move down to 5th item.
Probably this would not be a regression but I see it.