[Fix] Add missing CUSpecifier to the  urlData for news.ycombinator.com
[Feature] Better fitting CU overlay for sites like Reddit, Hacker News
Add option 'useInnerElementsToGetOverlaySize' and related code to allow specific sites' overlays to have their sizes determined based on the
innermost leaf child elements of the CU (instead of the outmost child elements, which is the default.)
[Cosmetic] Change stackoverflow.com overlay padding
[Refactor] Rename 'swiftly' to 'UnitsProj'