This patch ditches use of the tablerenderer in favour of just showing the most recent posts, and linking off to view/artefact.php for the rest. I added pagination to assist that.

Needs cleanup for sure, but for now it's there and it works.

I've not touched some strange things I saw while doing this, such as the 'resumefive' and 'resumefour' classes on the tables. I can only assume they're used somewhere, although grep gives no clues.

now each plugin can say whether it can be disabled or not. defaults to true

NEEDS TESTING!!!

The only places in Mahara that don't want this are upgrades, which I
changed as well.

(cherry picked from commit 66ee3c5506c7f15acb9ce172d1d6cf8add34a582)

Removed a commented out method that hasn't been necessary thus far.

Change to earlier fix for View access positioning problem (bug 3041) which moved submit buttons in Firefox