QmlDesigner: Support aliases in Connection View

- Allows user to select aliases in connections view
 - Seeks signals for aliases

Task: QDS-2411

Change-Id: I69eb875eb99cbf8cd6a842d5f7e166d9990bb255
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/connectioneditor/dynamicpropertiesmodel.cpp

@@ -399,7 +399,6 @@ QStringList DynamicPropertiesModel::possibleSourceProperties(const BindingProper
             if (metaInfo.propertyTypeName(propertyName) == typeName) //### todo proper check
                 possibleProperties << QString::fromUtf8(propertyName);
         }
-
         return possibleProperties;
     } else {
         qWarning() << " BindingModel::possibleSourcePropertiesForRow no meta info for source node";