Hello Harald Braunstein,
We have added such properties in the Latest Internal Build. They are TopLevelShowDelay
. You could download the LIB and give it a try or you can wait for the next service pack (in a week or two).
I hope this information will help you.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items