Fixups for the link popup

KDeclarativeWebView:
- delegate all links to us, we decide what goes where
- everything is loaded inside the current page -- we'll need
to check the target here, >> FIXME
- with all links intercepted from QWebPage, we can handle pressAndHold
in out own code, so wire up what we need exported to the QML WebView

FlickableWebView:
- suspendInteractive property: disables flicking temporarily, triggered
when our linkpop up opens -- this unscrews interaction with the
underlying flickable when our popup opens

LinkPopup:
- Make copy work
- Fix labels
- fix anchoring inside popup