refactor(toolbar): create mixin for toolbar styles
refactor(toolbar): create mixin for toolbar styles

 - to allow creating toolbar sized elements elsewhere.  This goes along with the existing tall, hero mixins.

paulussup/ng2-material,dmacfarlane/ng2-material,parmalatinter/ng2-material,mailiam/ng2-material,mailiam/ng2-material,parmalatinter/ng2-material,paulussup/ng2-material,Q-Free-OpenRoads/ng2-material,mailiam/ng2-material,Q-Free-OpenRoads/ng2-material,dmacfarlane/ng2-material,dmacfarlane/ng2-material,Q-Free-OpenRoads/ng2-material,parmalatinter/ng2-material,Q-Free-OpenRoads/ng2-material,paulussup/ng2-material