title: ui header file (ui_name.h) not found
body: <p>I've created form, saved it in project directory. And now i want to add some code.
  So, I've created header file:</p>
  
  <pre><code>#ifndef SORTDIALOG_H
  #define SORTDIALOG_H
  
  #include &lt;QtWidgets/QDialog&gt;
  #include &lt;QtWidgets/QWidget&gt;
  
  
  #include "ui_sortdialog.h"
  
  
  class SortDialog: public QDialog, public Ui::SortDialog
  {
      Q_OBJECT
  public:
      SortDialog(QWidget *parent=0);
      void setColumnRange(QChar first, QChar last);
  }
  
  #endif // SORTDIALOG_H
  </code></pre>
  
  <p>during writing code Qt creator see ui_sortdialog.h, and i, for example, can see "Ui" namespace. But when i'n trying to compiler writes that ui_sortdialog.h wasn't found</p>
  
  <pre><code>C:\Qt\Qt5.1.1\Tools\QtCreator\bin\untitled2\sortdialog.h:8: error: ui_sortdialog.h: No such file or directory
   #include "ui_sortdialog.h"
                         ^
  </code></pre>