$_icons and $themeSettings view variables need to be set early on
Use https url for blog feed
Allow override css settings by request prefix
Allow specifying 'class' for radio/checkbox <input>
Merge branch '2.2-checkbox-radio-class' into 2.2

* 2.2-checkbox-radio-class:
  Allow specifying 'class' for radio/checkbox <input>
  Allow override css settings by request prefix