SierraRest: Add support for API v4 features that allow fetching pickup locations and adding comments when placing a hold. (#1114)

- jstree fixes
- new variable style for PR#1102
- More complete variable styling similar to #1102

- replaces table summaries with captions (sr-only) to avoid validation warning 'table summary not supported in html5'

- Add helper function to check/retry setValue to compensate for browser glitches
- Add some missing snooze calls to ensure consistent timing

ignore files like themes/.../css/less/lessphp_c007ba97e4ce96f1beb961f751016c35.list

- Removes unnecessary base behavior from majority of drivers.

- Thanks to Jason Cooper for the patch.

- use the standard Date Converter to format dates consistently
- display some date values that were previously listed as 'N/A'

- It now works when there are additional fields in the selected sort or *:* is specified as the search term. 

This reverts commit ed994210.