Bug 1996475: Submitted portfolios appear as column on reports

in the Admin → Reports section

Fixed for:
- page activity report
- page access report
- SmartEvidence summary report

'Submission status' column added and all three statuses are listed
for portfolios so it's clear which ones are currently submitted,
released, or not submitted.

Change-Id: I1ce7f11f053742b6d32c279e19401aafe3d74ac7
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>