don't remove the sections on file page / remove special casing (bug 42741)

this stops sections from being scrubbed on file pages
the result of this is sections on the file page cannot be toggled
if toggled sections are wanted this should be done on the server side or
at the very least involve refactoring mf-toggle.js/mf-toggle-dynamic.js

Change-Id: I5cf27696bb89bdfd3b283659efcce552ccb97c0e
Merge "don't remove the sections on file page / remove special casing (bug 42741)"