[PD] Pad/pocket: fix wrong error message

- the error can also occur when the mode it not UpToFace (ToFirst or ToLast)
- also add note when Reversed checkbox is enabled since this is no obvious (as discussed in the forum)
- also some whitespace unification and include sorting

src/Mod/PartDesign/Gui/TaskExtrudeParameters.cpp

@@ -20,15 +20,13 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h"
-
 #ifndef _PreComp_
 # include <QSignalBlocker>
 #endif
 
-#include <Base/UnitsApi.h>
 #include <App/Document.h>
+#include <Base/UnitsApi.h>
 #include <Gui/Command.h>
 #include <Mod/PartDesign/App/FeatureExtrude.h>
 
@@ -36,6 +34,7 @@
 #include "TaskExtrudeParameters.h"
 #include "ReferenceSelection.h"
 
+
 using namespace PartDesignGui;
 using namespace Gui;