backport multiple commits

Backport from master these bug fixes:

• Fix window title with UTF-8 strings : !10737 (merged)
• fixes blank screen on Windows with OSPRay >=2.12 : !10753 (merged)
• Fix wrong sign in vtkImplicitPolyDataDistance : !10758 (merged)
• vtkOpenVDBReader: Fix a FileName leak : !10772 (merged)
• Fix test compilation due to missing header include : !10788 (merged)
• BorderWidget: Leaving the viewport should unselect : !10775 (merged)

backport: release