[PD] make pointers to the UI std::unique_ptr

Same as PR #4293, just for PartDesign

as noted in https://github.com/FreeCAD/FreeCAD/pull/4271#discussion_r554673632
the pointer to the UI should be a unique pointer.

This PR does this for all PartDesign dialogs that don't already use a unique_ptr.

src/Mod/PartDesign/Gui/TaskTransformedParameters.cpp

@@ -65,14 +65,12 @@ using namespace Gui;
 
 TaskTransformedParameters::TaskTransformedParameters(ViewProviderTransformed *TransformedView, QWidget *parent)
     : TaskBox(Gui::BitmapFactory().pixmap((std::string("PartDesign_") + TransformedView->featureName).c_str()),
-              QString::fromLatin1((TransformedView->featureName + " parameters").c_str()),
-              true,
-              parent),
-      proxy(nullptr),
-      TransformedView(TransformedView),
-      parentTask(nullptr),
-      insideMultiTransform(false),
-      blockUpdate(false)
+              QString::fromLatin1((TransformedView->featureName + " parameters").c_str()), true, parent)
+    , proxy(nullptr)
+    , TransformedView(TransformedView)
+    , parentTask(nullptr)
+    , insideMultiTransform(false)
+    , blockUpdate(false)
 {
     selectionMode = none;