title: Qt Creator - custom namespace for UI classes
body: <p>I would like to have a UI class in its own namespace, like ProjectName::MainWindow. Is there some convenient way how to achieve this in Qt Creator, please?</p>
  
  <p>I can open the mainwindow.ui file and change the  from "MainWindow" to "ProjectName::MainWindow", which compiles and works. But when I change something in the UI designer, the ui file gets generated again ... with the wrong class name.</p>