[Drawing] App: remove unused headers

- also some sorting
- also enable precompiled header

src/Mod/Drawing/App/AppDrawing.cpp

@@ -12,17 +12,17 @@
 #include "PreCompiled.h"
 
 #include <Base/Console.h>
-#include <Base/PyObjectBase.h>
 #include <Base/Interpreter.h>
- 
-#include "FeaturePage.h"
-#include "FeatureView.h"
-#include "FeatureViewPart.h"
-#include "FeatureViewAnnotation.h"
-#include "FeatureViewSymbol.h"
-#include "FeatureProjection.h"
-#include "FeatureViewSpreadsheet.h"
+#include <Base/PyObjectBase.h>
+
 #include "FeatureClip.h"
+#include "FeaturePage.h"
+#include "FeatureProjection.h"
+#include "FeatureView.h"
+#include "FeatureViewAnnotation.h"
+#include "FeatureViewPart.h"
+#include "FeatureViewSpreadsheet.h"
+#include "FeatureViewSymbol.h"
 #include "PageGroup.h"