Moving mouse out of Window when still holding scrollbar is treated as unactive

I have a simple Group on a Window widget. This Group has many elements which spawns a scrollbar. If I hold onto the scrollbar and move my mouse outside of the current window `nk_item_is_any_active` will return false even though I haven't let go of the scrollbar. The expected behaviour is the Group widget is still being active/focused.

Demonstration:

https://user-images.githubusercontent.com/34767287/221190771-16ae477b-d63b-4e9b-bcdc-758b668e1981.mp4

I'm currently using the raylib runtime at https://github.com/RobLoach/raylib-nuklear

Start by tracing nk_item_is_any_active in the Group/Window scrollbar interaction described in the issue, using the linked demonstration and raylib runtime for reproduction. Check how dragging state is handled when the pointer leaves the window; done means the Group remains active until the scrollbar is released.

Written by the indexing model from the issue text.