Imlementing note view, small fixes (refs #19048)

* saving notes on 'googlechart.googlecharts' view instead of
  'googlechart.notes' - another view would activate functionality not
  needed for notes
* adding 'get_all_notes_json' function that is used for view and
  embedded views to provide the notes list to the javascript frontend
* commenting get_notes from chart.py and chart-notes page as this
  functionality appears to no longer be used
* removing sumbmit_notes and get_notes pages as there is no need for
  them at this time
* updating embed views to include underscore.js
* updating view and embed views to properly parse the note list and
  display notes to the correct charts
* fixing note edit functionality to proper update the tables and fetch
  note fields