Getting ImGuiContext or just a list of current windows?

[Hi-ImKyle]

I'd like to get the ImGuiContext to loop through all the current Windows but there doesn't appear to be anyway to do this at the moment. The context contains the list of windows amongst other things. Or a direct way of getting a list of active windows.

ImGui::ShowMetricsWindow() within the imgui source does what I'd like and that's just getting a list of windows and their positions, would be nice if I could move the window programmatically through this way too, but not even sure imgui supports that out of the box.

[Hi-ImKyle]

PR #273 provides the ability I am looking for but is a few versions behind