further untangle case list/detail ui code

- get rid of all id attributes
- untangle the last ko.applyBindings left within the js code
- remove some cruft
move sortRows initialization into DetailScreenConfig
use global namespace for toggles

since toggles & feature previews are inherently global
declare them in a global namespace and access them directly
from within detail-screen-config.js
rather than passing them in as (differently named!) variables