Re-use the code written for the library detail page for displaying authors and maintainers on the homepage. To avoid duplicating code, moved all the necessary pieces to a mixin to be used by HomepageView and LibraryDetail, and adjusted it to work for both.
* Resolves the issue with libraries not updating on version dropdown
selection going back from version to latest
* Fixes edge case of version alert not showing when query params are
deleted from location bar
* Adds refactor of version selection drop downs on library preference
page and cleans up some unused ones.
* Fixed issues with releases page and versioning
* Added latest support and version alert
* Updated version alert to link to /release and clarify most recent vs
vs "release" selection
* Refactored Libraries and Releases pages to align similar code for
reuse.
- Change mixin to allow for no versions or libraries
- Show message when there is no data, and hide rest of template
- Hide featured library block if there is no featured library
