InputText with popup

[pavledev]

Version/Branch of Dear ImGui:

Version: 1.90 WIP
Branch: docking

Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_win32.cpp + imgui_impl_dx11.cpp
Compiler: VS2022
Operating System: Windows 10

My Issue/Question:

Code for rendering InputText with popup from here #718 (comment) causes IM_ASSERT(window == window->RootWindow); assert to fail https://github.com/ocornut/imgui/blob/docking/imgui.cpp#L7693 after popup and window are closed

[ocornut]

I think the assert (added in 936f532) was incorrect here, pushed fix 0860671.
I will work on a regression test as this is rather subtle / fringe case to combine the Popup and Child flags and not tested enough.
Thank you!