Finish the move to the new designs

[adam-buckley]

I'm trying to migrate completely to Vue 3 and the mix of both base templates is causing issues. We need to close off the move to the new designs as keeping the old foundation around keeps a few issues open:

• its making the codebase more complicated than it needs to be
• a lot of the old libraries that we used have open CVEs and are too difficult to upgrade/maintain - especially when we're trying to move to the new designs
• using to main templates means application specific code (e.g. Vue 2 code in tags) is nearly impossible to change to support both templates

Progress

Form

• application
  • delete.php
  • edit.php
  • export.php
  • import.php
  • index.php
  • show.php
• cron
  • updateformview.php
  • delete.php
  • edit.php
• event
  • delete.php
  • edit.php
  • settings.php
• export.php
• field
  • ajaxGetMetadata.php
  • delete.php
  • edit.php
  • manage_subform.php
  • move.php
• import.php
• index.php  
• instance
  • ajax_save_form_instance.php
  • delete.php
  • edit.php
• mapping
  • edit.php
• show.php