Backported r75354: Fix layout of content within a floating object by using Move and not SetPosition; prevent creeping of floating objects on layout.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75359 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775