How to delete empty element in popup list

I have a question about a suspicious behaviour in Forms Builder 10.1.2.0.2.
When I have a list object (pop up list) I can define some values in the attribute palette of the object.
So you can set a shown name and a value behind. In this little window to set the items of the popup list you get automatically a white empty item at the end of the list. When I click now on this empty item (you do so, when you want to add an item) Forms Builder automatically adds an new empty item at the end.
When I click this new empty item, Forms Builder adss another empty one ... and so on.
It´s very suspicious because, when I end this dialog with "OK", it will be saved and when I open the form (over web) I have at the end of the list one, two (or more) empty elements in list.
But I can´t delete this empty ones from the list in Forms Builder.
So my question:
how can I delete empty items in a popup list??
I try it with hit "del" button at keyboard or delete the set value for the item (I hope Forms Builder delete items without value). But all does not help.

Thanks jwh for this great solution! :)
On my german keyboard it is:
ctrl+< for deleting a line
ctrl+> (= ctrl+shift+<) for adding a new line
Thanks! :)
I have another question (you can maybe help me, too?).
On this popup lists you can have several items. When you open a form (via web) and the list has more than x items (maybe 5 or 6) the form shows a scroll bar on the right side.
Is there any poosibility to set how much items has to show and only show a scroll bar when there are more items in the list?
Or other way: set the maximum of shown items so big, that there will be no scroll bar.
Message was edited by:
ulfk

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HI
In my program checkbox(before the record is displayed)
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