office-ui-fabric-react v6.129.4

Patches

• Specify prop "type" to be "button" for links which are of type button (commit by dan-hanlon, pr #7787)
• Fix ColorPicker when alpha slider is hidden (commit by ecraig12345, pr #7785)
• Add documentation and tests for color utilities (commit by ecraig12345, pr #7783)
• Combobox: Pass taxIndex to Autofill component (commit by leddie24, pr #7768)
• Panel: Add aria-hidden attribute to prevent narrator from reading when transitioning to a closed state (commit by leddie24, pr #7771)
• Added screener tests to Breadcrumb component to prevent regression (commit by khuynh92, pr #7780)
• position anchor currently by default uses either the given alignment edge or uses the positive flanking edge, without regard to whether the positive or negative edge has more room. This change uses the bounds to determine which side has more room and flips the anchor around, to solve issues with dynamically resizing callouts not having enough room to grow if they default to a top-anchor (commit by lorejoh12, pr #7778)
• Fix the regression in DocumentCard role by commit 5b8befe. It should always use props.role if it is defined. (commit by yiminwu, pr #7796)