`Window.size_changed` signal does not get called, when `content_scale_aspect` is set to anything other than `CONTENT_SCALE_ASPECT_EXPAND`

[JHDev2006]

Tested versions

• Reproducible in both 4.6.3 stable, and 4.7 stable.

System information

Godot v4.7.stable - Linux Mint 22.2 (Zara) on X11 - X11 display driver, Multi-window, 3 monitors - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3070 Ti (nvidia; 595.71.05) - AMD Ryzen 7 5800X 8-Core Processor (16 threads) - 31.24 GiB memory - PulseAudio (44100 Hz, Stereo/mono)

Issue description

When using size_changed on the main window, either via get_viewport().get_window() or get_tree().root, its size_changed signal only gets called if its content_scale_aspect is set to CONTENT_SCALE_ASPECT_EXPAND. I assume this may be because it only calls it if the actual viewport inside gets resized, instead of the window. However, using get_window() or root, explicitly returns the WINDOW, therefore, if the window itself gets resized, it should emit the signal, regardless of the size of the viewport, it contains.

Steps to reproduce

1. connect a dummy function to get_tree().root.size_changed
2. resize the window, while both content_scale_aspect is set to CONTENT_SCALE_ASPECT_EXPAND and then any other setting
3. observe how the signal only gets called, while CONTENT_SCALE_ASPECT_EXPAND is set, as the current windows content_scale.

Minimal reproduction project (MRP)

size_changed is a lie.zip

[McOmghall]

Seems fixed on master latest.