[#43426885] Here I fleshed out the look of vertical tabs and added another example in the html page.
[#43426885] For this commit I added js capability for collapsable fieldsets and added custom styles for these sets.
[#43426885] Fixed merge conflicts with more recent PR's that were merged before this one...
[#43426885] Fixed a merge conflict with typography.scss.
[#43426885] Fixed a merge conflict with typography.scss.
Merge pull request #34 from mlauren/43426885_add_collapsable_fieldset_to_branding_features

[#43426885] add collapsable fieldset to branding features