I have created a dynamic segment with a definition. I open up the newly created segment - which has not yet completed provisioning - and a notification informs me that the segment is locked until provisioning is done. But I can still go to "Definition" and change the definition of the segment. But when I click "Save" (lower right corner of form) nothing happens. I assume that the segment form should be locked for editing (including the "Definition" pane) until segment provisioning is completed?