Upgrading jQuery from 1.6.1 to 1.9.0

Upgrading jQuery from 1.6.1 to 1.9.0
Upgrading jQuery UI from 1.8.3 to 1.10.0

upgraded tablesorter version to 2.7.8 (Mottie - https://github.com/Mottie/)

tablesorter_filter is not actively being maintained anymore

replacing tablesorter_filter with quicksearch - https://github.com/riklomas/quicksearch

I think I found all the tablesorter usages and replaced them with the "quicksearch" usage

courses index page - I made a small change that makes the whole row clickable. I'm not sure if the last column "Column Tools" serves a purpose now, but I thought i'll ask you before removing it altogether.