Fixups with Qt6 enums (#13611)

* Python PySide enums to C++ converter

* Python IntFlags to C++ int in getStandardButtons

* Remove int conversion in mods Python sources

src/Mod/Fem/femsolver/solver_taskpanel.py

@@ -156,7 +156,7 @@ class ControlTaskPanel(QtCore.QObject):
         femsolver.report.display(machine.report, _REPORT_TITLE, text)
 
     def getStandardButtons(self):
-        return int(QtGui.QDialogButtonBox.Close)
+        return QtGui.QDialogButtonBox.Close
 
     def reject(self):
         Gui.ActiveDocument.resetEdit()

src/Mod/Fem/femtaskpanels/task_mesh_gmsh.py

@@ -107,9 +107,7 @@ class _TaskPanel:
         self.update()
 
     def getStandardButtons(self):
-        button_value = int(
-            QtGui.QDialogButtonBox.Ok | QtGui.QDialogButtonBox.Apply | QtGui.QDialogButtonBox.Cancel
-        )
+        button_value = QtGui.QDialogButtonBox.Ok | QtGui.QDialogButtonBox.Apply | QtGui.QDialogButtonBox.Cancel
         return button_value
         # show a OK, a apply and a Cancel button
         # def reject() is called on Cancel button

src/Mod/Fem/femtaskpanels/task_result_mechanical.py

@@ -265,7 +265,7 @@ class _TaskPanel:
         self.result_widget.sb_displacement_factor_max.setValue(100.)    # init non standard values
 
     def getStandardButtons(self):
-        return int(QtGui.QDialogButtonBox.Close)
+        return QtGui.QDialogButtonBox.Close
 
     def get_result_stats(self, type_name):
         return resulttools.get_stats(self.result_obj, type_name)

src/Mod/Fem/femtaskpanels/task_solver_ccxtools.py

@@ -167,7 +167,7 @@ class _TaskPanel:
     def getStandardButtons(self):
         # only show a close button
         # def accept() in no longer needed, since there is no OK button
-        return int(QtGui.QDialogButtonBox.Close)
+        return QtGui.QDialogButtonBox.Close
 
     def reject(self):
         FreeCADGui.ActiveDocument.resetEdit()