Enable extensions by default
Enable most extensions, open Extensions form, turn on lots of options by default - this aids discovery but we may turn this off before official release, needs user feedback.
Reduce specifity and cleanup CSS
First pass as stripping out unnecessary decendant selectors, removing excessive clear-fixing and other minor changes. Slight change to how list-horizontal mixin works - you can now pass in a list item selector - this helps reduce specificty by not relying on the UL root selector. Start general shift to removing as many element selectors as possible and ony using classes.
Review and clean up font icon variables, make sure every icon has a unique variable in _varaibles and is used in the relevant partial, make the actual icon font a variable also to make it easiser to globally change the icon font.