Created by: mattez
Small change which fix two issues:
1] Buttons :hover and :focus state shares styles now.
As you expect and as it is in BS3, :focus state is same as :hover state only extended by outline.
Before: .btn with :focus appears as normal button state with 'outline':
After: .btn with :focus looks like :hover state with 'outline':
2] Buttons :focus text color on 'a.btn' is now consistent with others '.btn'.
If you somewhere define specific color (e.g. $danger) for :focus state on <a> then ...
Before: This specific color is presented in :focus state on .btn made from <a>:
After: Specific color is overridden with right .btn color:
