Sets whether the ContextMenuRequested event is handled by host after
the event handler completes or if there is a deferral then after the deferral is completed.
If Handled is set to TRUE then WebView will not display a context menu and will instead
use the SelectedCommandId property to indicate which, if any, context menu item command to invoke.
If after the event handler or deferral completes Handled is set to FALSE then WebView
will display a context menu based on the contents of the MenuItems property.
The default value is FALSE.
Sets whether the ContextMenuRequested event is handled by host after the event handler completes or if there is a deferral then after the deferral is completed. If Handled is set to TRUE then WebView will not display a context menu and will instead use the SelectedCommandId property to indicate which, if any, context menu item command to invoke. If after the event handler or deferral completes Handled is set to FALSE then WebView will display a context menu based on the contents of the MenuItems property. The default value is FALSE.