#188 use FXWebViewPanel as browser component
close #188 using calpa as fallback browser comp

when something went wrong with the intialisation of the JavaFX
WebView, the calpa html panel is used as fallback case. this ensures
backwards compatibilty also for clients with jre 6 where java fx is not
available per default.
Merge branch 'feature/188-fx-webview-getFeatureInfoDisplay' into dev