Imgui: Docking doesn't work over child window when parent is docked

[coolxv]

Version/Branch of Dear ImGui:

Version: 1.78 WIP
Branch: table + docking

Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_win32.cpp + imgui_impl_dx11.cpp

Operating System: Windows

My Issue/Question:

[malamanteau]

I just noticed this issue as well, it was not present in a previous version I was using which was somewhere around 1.74.

[ocornut]

Working on it currently.

[ocornut]

Broken by 85a661d276a27063b39209fd52deab1a793bfbed

[ocornut]

Should be fixed by cf312545e87146000bd96a1827d94a97ca7b17a0
Also made sure things works with floating dockspace. We will be adding regression tests soon.