Base: cleanup includes in *PyImp.cpp

Sort includes and implicitely add missing ones. While there
consistently explain where generated files some from.

src/Base/BaseClassPyImp.cpp

@@ -20,10 +20,11 @@
  *                                                                         *
  ***************************************************************************/
 
-
 #include "PreCompiled.h"
 
-// inclusion of the generated files (generated out of BaseClassPy.pyi)
+#include "Type.h"
+
+// generated out of BaseClass.pyi
 #include "BaseClassPy.h"
 #include "BaseClassPy.cpp"
 
@@ -35,7 +36,6 @@ std::string BaseClassPy::representation() const
     return {"<binding object>"};
 }
 
-
 PyObject* BaseClassPy::isDerivedFrom(PyObject* args) const
 {
     char* name {};