* Add an API-only user preference for diff type
* Retain query parameter stickiness but fix it so that the diff-type
from user preferences does not leak into the query string. So the
no-JS control continues to work. If a no-JS user has the inline
preference set, respect it on the initial load, but add an explicit
diff-type=table to the query string of the table link so that the
preference can be overridden.
* Get the diff type from the initial state of the no-JS button. Infuse
the widget to access the active property using the OOUI public API.
* For a logged-in user, when the JS toggle is clicked, fetch the new
diff body and update the user preference.
* For an anonymous user, when the JS toggle is clicked, update the
prev/next links to include the correct diff-type query parameter.
Bug: T336713
Change-Id: Ie409d79ac8222dfa6ec8fd170b76be088be80b3a
2b608a35ed