Progress popup window height isn't updating properly

[passivestar]

Tested versions

v4.3.beta1.official [a4f2ea9]
But it's been like this in 4.2 and 4.1 as well

System information

Godot v4.3.beta1 - macOS 14.4.1 - Vulkan (Forward+) - integrated Apple M1 Max - Apple M1 Max (10 Threads)

Issue description

A bit of a nitpick I guess but the import progress popup is getting squashed when a second progressbar is added to it:

This is what it looks like in a video:

Screen.Recording.mp4

Steps to reproduce

I suppose import some gltf file and some texture files at the same time to see this

Minimal reproduction project (MRP)

N/A