The <dialog:dynamiclist> requires always options with values in the format id:order_number and doesn't allow to only specify options without any values. We shoudl allow the body of the tag to be options without values since the name of the options itself and their order is sufficient to describe the data.
At this time it has to be
<dialog:dynamiclist buffername="DYNAMIC_LIST_1">
<option value="1:100">Initially added item 1</option>
<option value="2:200">Initially added item 2</option>
<option value="3:300">Initially added item 3</option>
</dialog:dynamiclist>
but we should allow
<dialog:dynamiclist buffername="DYNAMIC_LIST_1">
<option>Initially added item 1</option>
<option>Initially added item 2</option>
<option>Initially added item 3</option>
</dialog:dynamiclist>