Bug 22784: Add the ability to archive/unarchive a purchase suggestions

Bug 22784: Add the ability to archive/unarchive a purchase suggestions

There are performance issues when searching suggestions if there are
thousands of suggestions.
To prevent that we are going to add the ability to archive purchase
suggestions, in order to remove them from the search list (by default).

Test plan:
0. Apply all the patches, execute the updatedatabase.pl script, restart
all
1. Create some suggestions
2. Search for them
3. Use the "Archive" action button for one of them
4. Restart the search
=> The archived suggestion does no longer appear in the list
5. Use the filter "Included archived" in the "Suggestion information"
filter box
=> The archived suggestion is now displayed
6. Use other filters
=> The "archived" filter is kept from one search to another
7. Use one of the action at the bottom of the suggestion list (change
the status for instance)
=> The "archived" filter is still kept

Sponsored-by: BULAC - http://www.bulac.fr/
Signed-off-by: Séverine QUEUNE <severine.queune@bulac.fr>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>