ISIS-639: increase buffer size in Jetty webserver for longer URLs.
ISIS-640: extending ViewModelSupport API
ISIS-638: ui hints and clipboard behaviour

Now captures view selection/page number/sorting for tables

New stuff:
* UiHintContainer (implemented by EntityModel)
* overrides of the various AjaxPaging widgets to send UiSetHint to owning page
* broadcast of UiHintEvents to all children
* subscription of hint events by EntityIconAndTitlePanel
* ZipClipboardLink, copy href from EntityIconAndTitlePanel

Also updated the archetypes web.xmls