[Drawing] App: remove unused headers

- also some sorting
- also enable precompiled header

src/Mod/Drawing/App/FeaturePage.cpp

@@ -20,31 +20,28 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h"
-
 #ifndef _PreComp_
 # include <fstream>
 # include <iostream>
+# include <iterator>
 # include <sstream>
+
+# include <boost/regex.hpp>
 #endif
 
-
-#include <Base/Exception.h>
+#include <App/Application.h>
 #include <Base/Console.h>
 #include <Base/FileInfo.h>
-#include <App/Application.h>
-#include <boost/regex.hpp>
-#include <iterator>
 
 #include "FeaturePage.h"
-#include "FeatureView.h"
 #include "FeatureClip.h"
+#include "FeatureView.h"
+
 
 using namespace Drawing;
 using namespace std;
 
-
 //===========================================================================
 // FeaturePage
 //===========================================================================