File explorer Window is wrapped when clicking Browse in import dailog, missing icons and unable to import projects.

[Anutrix]

Godot version:
master build fafb0ba

OS/device including version:
Window 10

Issue description:

• Issue 1: File explorer Window is wrapped when clicking Browse in import dialog.
• Issue 2: Resizing to see file list also reveals that icons for files and folders are missing.
• Issue 3: Import .project files does not open project.

I made a single issue since they seem related.

ERROR: Condition "!windows.has(p_window)" is true.
   at: window_resize (drivers\vulkan\vulkan_context.cpp:722)

is also seen in the console every time I interact with a window such as opening a folder or changing drive.

Steps to reproduce:

1. Open Godot.
2. Click Import.
3. Click Browse. - Issue 1 is observed.
4. Resize to seem files. - Issue 2 is observed.
5. Select any .project file to import. - Issue 3 is observed.

[Anutrix]

When popups weren't Windows(pre-441f1a5), they used to be x%(I think 80)/similar of the height and width of the parent window. In other words, they were dependent on parent windows.
But now since they are independent, they use min-height and min-width leading to things like Trees which don't have min size by default to shrunk to size 0. This is the reason for Issue 1.

[CNate]

The Vulkan layers can be fixed by installing the latest Vulkan SDK. I am also encountering the resizing error on top of a few other things

[Calinou]

For the record, this also occurs with the Quick Open dialogs:

[akien-mga]

Issue 3 should be fixed by #39993 which supersedes #39145, so all issues are fixed.