ui:CommandBar.SecondaryCommands with gesture text: too high

[deakjahn]

  <ui:CommandBar.SecondaryCommands>
    <ui:AppBarButton Label="Export" Command="{StaticResource DoExport}" InputGestureText="Ctrl+E" />
    <ui:AppBarButton Label="Import" Command="{StaticResource DoImport}" InputGestureText="Ctrl+I" />
  </ui:CommandBar.SecondaryCommands>

If the buttons have InputGestureText attributes specified, the ellipsis button will be erroneously high:

As soon as the gestures are removed, the extra red margin disappears.