Do not crash on *every* page load if there is no ToS Document.
Do not crash on *every* page load if there is no ToS Document.

'tos' ReferenceProperty might be present, but still be None.

Patch by: Todd Larsen
Review by: to-be-reviewed

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging