fix nav in high contrast according the changes in master branch#15265

Merged

Phoebe-0319 merged 2 commits intomicrosoft:office-ui-fabric-react_v5.79.1from Leolewin:hotfix_9/office-ui-fabric-react/5.79.1

Oct 29, 2020

+28-2

Commits on Sep 24, 2020

fix nav in high contrast according the changes in master branch
limingliu
committed

Commits on Oct 29, 2020

Merge branch 'office-ui-fabric-react_v5.79.1' into hotfix_9/office-ui-fabric-react/5.79.1
Phoebe-0319
authored