Camera2D's editor draw doesn't respect window stretch scale

[Grublady]

Tested versions

• Reproducible in: 4.3-dev6, 4.2.2-stable, 4.1-stable, 4.0-stable, 3.5.3-stable

System information

Godot v4.3.dev6 - macOS 14.4.1 - Vulkan (Mobile) - integrated Apple M1 Max - Apple M1 Max (10 Threads)

Issue description

Camera2D's editor_draw_screen preview does not accurately reflect the screen rectangle when using a non-unity scaling factor for the display/window/stretch/scale project setting.

Editor preview (actual):

Running the scene:

Note how the drawn screen rectangle in the editor contains the entire sprite, whereas running the scene shows that the sprite actually eclipses the screen rectangle.

Expected editor preview, simulated by setting the Camera2D's zoom to the stretch scale:

Steps to reproduce

• Add a Camera2D
• Under project settings → display → window → stretch, set scale to a value other than 1

Minimal reproduction project (MRP)

N/A

[timothyqiu]

Note that the camera is not necessarily affected by the main window. For example, the scene could be instantiated inside another SubViewport or popup window.