* use a trailing slash when possible
* use https when possible
* remove a few redirected links
* consistently use `https://popper.js.org/`
* fix `iconUrl` in nuget files
* change Jekyll Windows guide to the official one
Bootstrap 4.0 Beta 1 dropped the offset classes in favor of using margin utilities. Update the blog example in the docs to use the appropriate `ml-auto` instead of `offset-sm-1` class to retain a pixel perfect with previous versions.
