open #1515
open #117
Layout styling in datetime picker;
Modded picker to hide time selects area
when time options are null;
(cherry picked from commit 6721093)
open #1515
open #117
Significant new vals added to constants files
for datetime picker/calendar;
Styling for calendar, hover and selected states;
Modded DateTimePickerController.js and markup
to allow selection of out-of-month cells;
open #1515
open #117
Significant re-org in menus.scss continued:
Refactored s-menu to s-menu-btn;
moved look-related style def's into .s-menu;
.menu now extends .s-menu;
