Visual inline diff view strips out HTML5 elements

To work around this and other issues, I've spun up https://drupal.org/project/diff_plus with a resolution for HTML5 elements as well as some other opinionated additions if any issue watchers would like to give it a try.

reroll

This needs to go into an MR with tests.

Along with the above mentioned things, couple of things are still getting removed
To name a few :
1. Style Attribute
2. ID's associated with Section
3.
4. Attributes like aria-label, data-title, data-lity, data-toggle, aria-expanded
5.  
6.