Refactor of usage dashboard (moved logic from JS to Ruby) (#2336) ...

* removed erroneous div tag

* Updated deep_copy on PLan model to set feedback_requested to false

* fixed typo in plan export

* refactored usage code to place most of the presentation logic into Rails instead of JS

finished up changes to usage

fixed eslinter issues

fixed rubocop issues

fixed additional rubocop issues

fixed issue with filter

fixed issue with totals

removed old controller test and added new usage_controller tests

added tests for new usage_helper

added usage_policy tests and pundit test helper

fixed some rubocop complaints

fixed up remaining rubocop issues

* removed opens in a new window for usage download buttons and moved org selector to below filters

* fixed some rubocop complaints in spec test

[Feature] Create plan from link (#2284) ...

* Added direct link for plan creation from templates list

* Moved link generation to helper

* Added modal for link copy

* Added JS for link copy

* Improved modal style and moved it to a partial

* Added template link copy to admin area (organisation templates)

* Added confirmation modal for creation link

* Minor changes for direct_link helper

* Fixed typo in YARD doc

Fix for Accessibility issues with Tables (highlighted by UCOP electronic accessibility review) ...

Changes:
  - Added scope="col" to table header tags <th> that were missing them.
  - The Jquery dropdown menus in tables are closed when the table cell
containing it is out of focus.

(The issue the fontawesome sort icons are read as 'column # link'.
Add some screen reader only text. This issue was sorted by someone else
who added ".screen-reader-text" class to the sort_link_name() method in
app/controllers/concerns/paginable.rb.)

Fix for issue #1455.

added externalLink.js back to application.js (#2013)

Update asset structure with webpacker gem