### Godot version

4.1.dev (dc625bcbfc5b587ba8867481ee7a1f6a567c25d0)

### System information

Mageia 9, Linux

### Issue description

When importing a project in current `master`, the following error is raised for each asset that gets imported:
```
Attempting to parent and popup a dialog that already has a parent.
```

It seems to be raised once per asset, caused by the progress dialog.

CC @bruvzg

### Steps to reproduce

- Import a new project in Godot that contains importable assets, e.g. https://github.com/RPicster/godot4-demo-desert-light

### Minimal reproduction project

See above.
Size2 screen_size;
		float viewport_aspect = desired_res.aspect();
		float video_mode_aspect = video_mode.aspect();
		if (content_scale_aspect == CONTENT_SCALE_ASPECT_IGNORE || Math::is_equal_approx(viewport_aspect, video_mode_aspect)) {
			
			viewport_size = desired_res;
			screen_size = video_mode;
		} else if (viewport_aspect < video_mode_aspect) {
			
			if (content_scale_aspect == CONTENT_SCALE_ASPECT_KEEP_HEIGHT || content_scale_aspect == CONTENT_SCALE_ASPECT_EXPAND) {
				
				viewport_size.x = desired_res.y * video_mode_aspect;
				viewport_size.y = desired_res.y;
				screen_size = video_mode;
			} else {
				
				viewport_size = desired_res;
				screen_size.x = video_mode.y * viewport_aspect;
				screen_size.y = video_mode.y;
			}
		} else {
			
			if (content_scale_aspect == CONTENT_SCALE_ASPECT_KEEP_WIDTH || content_scale_aspect == CONTENT_SCALE_ASPECT_EXPAND) {
				
				viewport_size.x = desired_res.x;
				viewport_size.y = desired_res.x / video_mode_aspect;
				screen_size = video_mode;
			} else {
				
				viewport_size = desired_res;