Version/Branch of Dear ImGui:

Version: 1.69 WIP
Branch: docking

Back-end/Renderer/Compiler/OS

Back-ends: Custom
Compiler: Visual Studio 2017
Operating System: Windows

My Issue/Question:

As you can see in the following screenshot, all viewports get the main viewport as their parent, even though the tooltip (viewport #4) should be a child of the demo window (viewport #3):

In practice this can result in some incorrect behaviour with the operating system's window manager. When applying this parenting in Windows it will cause undesired Z-ordering, moving the tooltip as well as the main viewport in front of the demo window.