Text Area for Highlights on 'Get Tickets' modal

[amitkaps]

As requested by @jace - I am leaving feature request for Box Office also on the funnel repository.

At VizChitra, we want to add highlight messages in the Get Tickets modal. Currently Box Office fields in the organisation setup are fixed and have limited options to add. Currently we are hacking refund policy field to add these messages. This messages gets added to every ticket invoice which is not ideal. Plus, we can not make these changes ourselves.

Feature Request:

1. Add a text field called Highlight to make it possible to add appropriate text.
2. Expose the UI for editing the highlight and cancellation & refund organisation fields - so we can make easier & frequent updates, as needed.