Story 578: Allow photo uploads on pages with infoboxes

Allow site to configure when to show photo uploader
This allows us to turn off the feature and tweak it easily
Follow advice in bug 44133 and add variable to startup module

Change-Id: I08f91aa6b960d642802463424f83c93f6387f0d1
Merge "Story 578: Allow photo uploads on pages with infoboxes"