Some dialogue window open too small

[FeatherAntennae]

Godot version:
v4.0.dev.custom_build.e7c9d8187

OS/device including version:
Windows 10 Pro 1909 (Build 18363.836)

Issue description:
Some dialogue window open too small, sometimes completely collapsing their main content.

Found so far:

• Browse dialogue when creating a new project:
  
  when resized:
  

• Orphan Resource Explorer:
  
  when resized:
  

Steps to reproduce:

• Browse dialogue when creating a new project:
  Create a new project -> Browse
• Orphan Resource Explorer:
  Load any project -> Project Menu -> Tools -> Orphan Resource Explorer

[ThakeeNathees]

DisplayServer issue, tracker to be added: #37734

[Anutrix]

Related to issue 1 of #37401.

[Anutrix]

This is because of the usage of Rect2i at

godot/scene/main/window.cpp

Line 995 in 163687d

Rect2i parent_rect;

instead of Rect2.