PartDesign/Gui: Move various utility stuff from Workbench to a separate file

Also do some header cleanup.

src/Mod/PartDesign/Gui/TaskPolarPatternParameters.cpp

@@ -28,11 +28,6 @@
 # include <QTimer>
 #endif
 
-#include "ui_TaskPolarPatternParameters.h"
-#include "TaskPolarPatternParameters.h"
-#include "TaskMultiTransformParameters.h"
-#include "Workbench.h"
-#include "ReferenceSelection.h"
 #include <Base/UnitsApi.h>
 #include <App/Application.h>
 #include <App/Document.h>
@@ -51,6 +46,13 @@
 #include <Mod/Sketcher/App/SketchObject.h>
 #include <Mod/PartDesign/App/DatumLine.h>
 
+#include "ReferenceSelection.h"
+#include "TaskMultiTransformParameters.h"
+#include "Utils.h"
+
+#include "ui_TaskPolarPatternParameters.h"
+#include "TaskPolarPatternParameters.h"
+
 using namespace PartDesignGui;
 using namespace Gui;