Tooltips: Fix brief description for QML elements

The brief description was not being shown. The help id for a
QML element is something like QML.Item while the extraction
mark is simply Item.

Reviewed-by: Thomas Hartmann
Reviewed-by: con

src/plugins/qmljseditor/qmljshoverhandler.cpp

@@ -124,7 +124,8 @@ void HoverHandler::identifyMatch(TextEditor::ITextEditor *editor, int pos)
             handleOrdinaryMatch(lookupContext, semanticInfo.nodeUnderCursor(pos));
             const QString &helpId = qmlHelpId(toolTip());
             if (!helpId.isEmpty())
-                setLastHelpItemIdentified(TextEditor::HelpItem(helpId, TextEditor::HelpItem::QML));
+                setLastHelpItemIdentified(TextEditor::HelpItem(helpId, toolTip(),
+                                                               TextEditor::HelpItem::QML));
         }
     }
 }