[TD] DrawD* - DrawT*: remove unused includes - part 2/2

- also sort includes
- also additions to precompiled header

src/Mod/TechDraw/App/DrawLeaderLine.cpp

@@ -22,19 +22,15 @@
 
 #include "PreCompiled.h"
 
-#ifndef _PreComp_
-#endif
-
 #include <App/Application.h>
 #include <Base/Console.h>
-#include <Base/Exception.h>
 #include <Base/Parameter.h>
 
+#include "DrawLeaderLine.h"
+#include "DrawLeaderLinePy.h"  // generated from DrawLeaderLinePy.xml
+#include "ArrowPropEnum.h"
 #include "DrawView.h"
 
-#include <Mod/TechDraw/App/DrawLeaderLinePy.h>  // generated from DrawLeaderLinePy.xml
-#include "DrawLeaderLine.h"
-#include "ArrowPropEnum.h"
 
 using namespace TechDraw;