Bump up the specificity on sorted col cell style Fixes #2532031

Reapply sort liner for FF FF doesn't support <th> + position: relative, so the sort indicator was rendering in the bottom right corner of the page.

Forgot to commit css assets for a11y updates

Add night skin sort arrows and s/sam/night/ (oops)

Use data attribute to id column, +indicator sprite * Add an indicator element to the sort header to leverage a css sprite for all arrows. * Change template to use <a role="button"> and role="presentation" on the indicator. * Use the data-yui3-col-{_id} data attribute to identify the column

_initRecordType optimz, -arrow flip on col hover

#2531703 - datatable sort night skin head color in IE

fixes #2531703 - night skin for datatable-sort

Initial WIP drop of datatable-sort