Bug 33426: Add DataTables saveState to suggestion.tt

Bug 33426: Add DataTables saveState to suggestion.tt

To test:
1. In the staff client, go to Purchase Suggestion management page and
   add a suggestion if needed to make the table display.
2. Make some changes to the table settings (hide/show columns, change
   sort column, and/or change number of rows to display)
3. Navigate to a different page.
4. Navigate back to Purchase Suggestions page. Note that the table
   settings have been reset.
5. Apply patch and restart_all
6. Repeat steps 1-4. Note that this time the changes to the table
   settings were preserved.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>