Add items to list using .Add instead of [i] =
Add items to list using .Add instead of [i] =

The List constructor does not allocate the items so that using [] to
fill the list will cause an exception.

Task-number: QTVSADDINBUG-38
Reviewed-by: joerg

lakiduo/QtAddin,lakiduo/QtAddin,lakiduo/QtAddin,lakiduo/QtAddin,lakiduo/QtAddin,lakiduo/QtAddin