Include all possible tags in prediction list

[KartikChugh]

Underneath DT-provided predictions, display other possible tags. This can be derived from official references, such as W3, as well as general research indicating the most popular tag choices.

[KartikChugh]

https://css-tricks.com/average-web-page-data-analyzing-8-million-websites/

[KartikChugh]

Smart prediction for doctype, html, head, body.

[KartikChugh]

Smart prediction for table, tr, td, etc.