ComboBox popup height is too small if it's been opened while empty

[Helyos96]

Describe the bug
If you open an empty ComboBox, the popup size somehow gets affected. If you add items to the ComboBox later on, it will remain quite small compared to the size it would have if items had always been there.

I haven't had any luck trying to force its height to be bigger. In fact I don't think you can control the size of a ComboBox popup?

To Reproduce

• Open ComboBox with items:
  
• Remove items and open it empty:
  
• Add items back and open it again, it's now quite small:
  

Expected behavior
Popup size should not remain small after opening an empty ComboBox. Would be even nicer if there was a way to control it (maybe I missed it though).

Desktop (please complete the following information):

• OS: W11
• Version: 0.29.1

[lucasmerlin]

• This is likely related to Improve Area sizing with dynamic content #5138