Ensure page property is set on Configuration
Only process links with href in pageNavigationList widget

Otherwise `substr` call fails for empty `href` when handling visited
pages.
Ensure Failed Pictogram is Displayed for New File Types

CSS rule was not specific enough to outrule file stage pictogram rules
created with the pageflow-hosted-file-stage mixin.
Merge pull request #214 from tf/navigation-list-visited-fix

Only process links with href in pageNavigationList widget
Merge pull request #215 from tf/file-thumbnail-failed-state

Ensure Failed Pictogram is Displayed for New File Types
Merge pull request #216 from tf/config-page-fix

Ensure page property is set on Configuration