Button captions, input item captions, etc. support captions with parameters (e.g.: {1}) for dynamic captions at runtime, but tab captions seem to be hard coded only. Why? I have a need for dynamic ones. I see there are workarounds to fake the appearance of tabs by using buttons that are styled as tabs and show/hide things, but why can't this be done declaratively right in a tab without workarounds and voodoo?