- Pass separator bars to tabs, disable drawn borders
- Remove ActionBar from leftnav
- Remove PrintProgressBar from leftnav
- Revise BreadCrumb button attributes
- Revise UpFolder icon
- Revise overflow/pancake menu icon
- Create OverflowButton to encapsulate common menu item
- Use horizontal/VerticalLine for consistent color/weight separators
- Reduce visual clutter
- Minimize regions created by color and line separators
- Reduce the contrast of separator lines
- Reduce the contrast of region backgrounds
- Use consistent background colors across sibling tab pages
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