Hello,
Then the documentation should indicate such. Even assuming the CMSListMenu user control isn't smart enough to indicate that in the incode documentation (the tooltips that Intellisense pops up) and so is stuck with whatever it can find, there is no indication in the documentation that it's not available for this control.
In fact, the documentation specifically states that it inherits all of the common properties from CMS - Common Controls.
It should be mentioned in our documentation or at least the itellisense shouldn't offer it as a possible property. I am going to discuss this with our development department and I will let you know about their opinion on this.
...Except CMSRepeaters are also hierachical. Why would it break CMSListMenu if it doesn't break CMSRepeater?
Good point, however you can easily break the hierarchical structure in the repeater by setting appropriate combination of Order by expression and the TopN property, so you have to be careful when you are setting up the hierarchical repeater or the universal viewer web part.
Best regards,
Jan Hermann