Factor brutestrap stylesheets into component specific and common stylesheets and scope with c3s.

The issue is, there are some complex types of selectors that our simple selector parsing implementation (used to determine the proper insertion point for the unique class to scope the rule) will not work on.

It's an enhancement to be able to support these types as well.

Works in Chrome and Firefox but Edge is throwing on line 163.

I guess it is probably due to a different property name in Edge.

Since edge does not currently support changing <CSSRule>.selectorText but does support <CSSStyleSheet>.insertRule we need to:

1. Get the last rule in the list.
2. Create a new rule string with modified selector text.
3. Delete the old rule at last index.
4. Add the new rule.

Loop this until we have done it <CSSRulesList>.length times.