Repair progressively enhanced load more

When logged out the progressive enhancement wasn't using the g
flag so was only able to insert one progressive enhancement per
fragment.

Add the 'g' flag so all progressive enhancements are applied. This
is a followup to I958576fdaad17c070542543be46969b77b57d92d which
introduced the bug.

Change-Id: I731d7d337ce73a3352884d653fd97dcd6664dbfb