Fix AIOOBE with root access disabled.

Page title and template array lengths got out of sync if root access was
disabled. Make sure this doesn't happen anymore by combining titles and
templates into a single list prior to filtering.

Change-Id: I069db9b9925887d6d80592eabe93b33abeaf0fe8
JIRA: RM-290
(cherry picked from commit 8ebe1736)