Just the forms plugin [Experiment, do not merge]

[markpatton]

An an experiment, clean out various hacks and try just running the forms plugin without appointment or any other complications. Unfortunately many of the same issues described in #75 are also present.

Issues observed:

• Various English translations needed.
• On manage plugins page, Uncaught ReferenceError: switchList is not defined
  at HTMLDocument. (ManagePlugins.jsp?plugin_name=:1074)
• Tries to load the js library toastr from the wrong location. Attempts /js/admin/jquery/plugins/toastr/toastr.min.js but is actually js/jquery/plugins/toastr/toastr.min.js
• Attempts to load http://localhost:8080/js/admin/locales/bootstrap-flatpickr..js because the macro to load flatpickr doesn’t handle <@getRegional language=language /> returning an empty string
• Date picker does not work when a date question is added, probably related to above.
  • Interestingly date pickers to select a range when viewing form answers work and are localized
• When clicking on a question to edit it, this exception shows up in the console, but the edit seems to work
  • Uncaught SyntaxError: Unexpected identifier ManageQuestions.jsp?view=modifyQuestion&id_step=5&id_question=17:790
• When using a form, these files are not found:
  • http://localhost:8080/js/plugins/asynchronousupload/load-image.min.js
  • http://localhost:8080/js/plugins/asynchronousupload/canvas-to-blob.min.js