Setting non-embedded borderless window to always_on_top makes window non-interactible

[AwesomeAxolotl]

Tested versions

reproducible in Godot v4.3.dev6, Godot_v4.2.1-stable

System information

Godot v4.3.dev6 - Windows 10.0.22631 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 4070 (NVIDIA; 31.0.15.5186) - AMD Ryzen 5 5600 6-Core Processor (12 Threads)

Issue description

A sub window that's not embedded and set to borderless bugs out when it's always_on_top property is set to true during runtime. The window remains visible, but the window's entry in the task bar closes. The visible window area cannot be clicked anymore and mouse clicks will go through to windows behind it
see:

A possible workaround is setting the window invisible and then visible again.

Steps to reproduce

• Project Settings -> do not embedd sub-windows
• Window node, set borderless flag to true
• set the window's always_on_top flag to true during runtime
  -> window gets unresponsive, can be clicked through

usage of the reproduction project:
run -> click button in sub window -> now the sub window is unresponsive, click-through

Minimal reproduction project (MRP)

reproduction_project.zip