Strange behaviour in popups

Hi,

Create a new project with a popup page

Go to general properties from this popup-page

Set the lifetime to 3000, and press Arrow-down to go to the field 'Effect'.

Go back with 'Arrow up' to the field 'lifetime', The number 3000 is selected, so press delete to change this time to nothing (zero, 0).

Press Arrow-down to go to the next field, Effects. See, that the field 'lifetime' is not set to 0, but the old value (3000) is back!

This is not logical in my opinion.

If you press Delete or Backspace to delete the content of a field, and press Arrow-down, the content has to be deleted.

Try this in excel:

fill a few fields in a row with numbers, and try the same procedure: press Arrow-up, press delete, and press Arrow-down --> the field is empty.

Please fix this.

Thanks

Theo