If the list items change at runtime by user interaction or otherwise changing the underlying
bound nodes Fore will rebuild the whole list during next execution of refresh().
Oftentimes lists are just static picklists that don't need to be rebuild at any time except load time.
Using the static marker attribute gives Fore a hint that it doesn't need to reconsider
this list once it has been build.
It is recommended to use 'static' whenever possible to optimize rendering speed.