Add additional help information throughout DOI UI

[jordanpadams]

Add info (something like ℹ️ ) icons on following pages / sections with the following text:

• Keywords text box - These keywords may be used to enable future discovery of these datasets. The auto-complete values are populated by the Unified Astronomy Thesaurus. Additional custom keywords may also be entered.

  • while updating that, also update to have text completion lineup with the cursor in the text box

• On Create DOI page, below "Ignore Warnings" checkbox, add text "Questions about process or information requested? See FAQs or contact the PDS Operator for assistance." For the FAQ page and email address, let's make sure we add the applicable icons to indicate they will be leaving the interface, and open in a new window.