Fuse.Navigation: fix visibility problem
Fuse.Navigation: fix visibility problem

    C:\fuselibs\Source\Fuse.Navigation\VisualNavigation.uno(132): E4128: Fuse.Navigation.PageData is less accessible than Fuse.Navigation.VisualNavigation.Pages

fusetools/fuselibs-public,fusetools/fuselibs-public,kusma/fuselibs-public,kusma/fuselibs-public,fusetools/fuselibs-public,fusetools/fuselibs-public,fusetools/fuselibs-public,kusma/fuselibs-public,kusma/fuselibs-public,kusma/fuselibs-public,kusma/fuselibs-public,fusetools/fuselibs-public,fusetools/fuselibs-public,kusma/fuselibs-public