"Ignore whitespace" toggle in the UI (BB-14331)

Many users have requested a way to toggle the "ignore whitespace" option directly from the UI. This is a follow-on from BCLOUD-6024 which provides a query param for ignoring whitespace, but isn't sticky (meaning that it needs to be re-applied to each page view and doesn't follow the user through navigation) and requires manually appending the query param to the url.