most styles are done; Picker and Combobox beta

widget changes:
  - partial refactors of relationwidget and combobox not included for
    stability. next commit will include some of these changes

style changes:
  - enlarged icon hitbox
  - finished re-organizing LESS styling for these widgets:
    - navigator
    - picker
    - workspace
  - enforce consistent XV.Input alignments
  - input overflow employs ellipsis
  - all workspace components use inherited background and other LESS
    values instead of each defining different ones
  - lightened things up a

TODO
  - re-instate value coloring. got lost somewhere in the LESS re-org
  - finish relationwidget. partial refactor not committed here

FIXME
  - first menu item says 'Menu0'
  - relation lists render sometimes below the box
  - CI tells me that some tests are failing

NOTE:
  - see other commits in this branch for info regarding XV.ValuePicker. I think
    we might prefer using this kind in the future; it does 90% of what
    XV.Picker does with 10% of the code.
  - we are still using enyo layout 2.1. we need to upgrade to 2.2 asap.

Completion ETA:
  - Tues Feb 11