Fixes a bug where the DatePicker would only open every other time it gained focus.#5583

lorejoh12 merged 3 commits intomicrosoft:mastermicrosoft/fluentui:masterfrom

kisiebel:kisiebel/date-picker-focus-bugkisiebel/office-ui-fabric-react:kisiebel/date-picker-focus-bugCopy head branch name to clipboard