Changes:
- c470170 Fix #99: Clicking a combobox results in NullReferenceException
- b7c2293 Fix issue where auto-hide taskbar doesn’t show
- 81df13d Fix issue where holding down the space/enter key invokes item rapidly
- 22f15fe Fix background of MenuFlyout in white high contrast (microsoft/microsoft-ui-xaml#2446)
- fa446fe Fix issue with settings button in top mode not receiving pointer events (microsoft/microsoft-ui-xaml#2442)
- 042bab2 Remove HamburgerMenuEx and style for NumericUpDown