michaelw/pagesize-orderby-pagination-rework-WIP

[Michael Wood <michael.g.wood@intel.com>]

Hi,

As discussed on the Toaster call today, I've been simplifying the 
mechanism for the common functions for the tables. I've also cleaned up 
the basetable templates.

It handles:
     - table items selector
     - paging
     - column order by and removing orderby when removing column
     - hiding columns which aren't shown by default
     - add remove column filter

WIP:
  - filtering is untested
  - some visual regression to the orderby indicator (I accidentally 
removed the orderby visual indicator)

I haven't looked very closely but I believe that potentially Dave's work 
for the package-details-view can just include the new basetable.js and 
it should all "just work".

Michael