QMLJSEditor Exporting few classes

These changes are required for the new Binding Editor

Change-Id: Ic1e833819c69831aa1a930ab668a644ae4ccdd6f
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/qmljseditor/qmljshoverhandler.cpp

@@ -59,7 +59,6 @@ using namespace QmlJS;
 using namespace TextEditor;
 
 namespace QmlJSEditor {
-namespace Internal {
 
 namespace {
 
@@ -517,6 +516,5 @@ bool QmlJSHoverHandler::setQmlHelpItem(const ScopeChain &scopeChain,
     return false;
 }
 
-} // namespace Internal
 } // namespace QmlJSEditor