[TD] P* - T*: remove unused includes

- also sort includes
- also additions to precompiled header

src/Mod/TechDraw/App/Preferences.cpp

@@ -30,13 +30,12 @@
 #include <App/Application.h>
 #include <App/Material.h>
 #include <Base/Console.h>
-#include <Base/Exception.h>
 #include <Base/FileInfo.h>
 #include <Base/Parameter.h>
-#include <Base/Vector3D.h>
 
 #include "Preferences.h"
 
+
 //getters for parameters used in multiple places.
 //ensure this is in sync with preference page user interfaces