Allow dragging of controls
Would it be possible to modify this condition
`if uMsg == WM_LBUTTONUP and control == pLastMouseButtonDownControl`
This would allow to trigger a mousebuttonup event on a different control so that a behavior like dragging elements or transference of attributes could be implemented

[https://github.com/simonkrauter/NiGui/blob/master/src/nigui/private/windows/platform_impl.nim#L1282](https://github.com/simonkrauter/NiGui/blob/master/src/nigui/private/windows/platform_impl.nim#L1282)