Misc. typos

Found via `codespell`
[skip ci]

src/Gui/NaviCube.cpp

@@ -133,7 +133,7 @@ using namespace Gui;
 // corner angle
 // menu actions
 // size
-// XYZ postion
+// XYZ position
 // menu feedback
 // colors
 // antialise cube icon
@@ -785,7 +785,7 @@ void NaviCubeImplementation::handleResize() {
 }
 
 void NaviCubeImplementation::drawNaviCube(bool pickMode) {
-	// initilizes stuff here when we actually have a context
+	// initializes stuff here when we actually have a context
     // FIXME actually now that we have Qt5, we could probably do this earlier (as we do not need the opengl context)
 	if (!m_NaviCubeInitialised) {
 		QtGLWidget* gl = static_cast<QtGLWidget*>(m_View3DInventorViewer->viewport());

src/Mod/Fem/Gui/ViewProviderFemMesh.cpp

@@ -1097,7 +1097,7 @@ void ViewProviderFEMMeshBuilder::createMesh(const App::Property* prop,
     vFaceElementIdx.resize(triangleCount);
     int index=0,indexIdx=0;
     int32_t* indices = faces->coordIndex.startEditing();
-    // iterate all not hided element faces, always assure CLOCKWISE triangle ordering to allow backface culling
+    // iterate all non-hidden element faces, always assure CLOCKWISE triangle ordering to allow backface culling
     for(int l=0; l< FaceSize;l++){
         if(! facesHelper[l].hide){
             switch( facesHelper[l].Element->NbNodes()){

src/Mod/Fem/femguiobjects/FemSelectionWidgets.py

@@ -456,7 +456,7 @@ class GeometryElementsSelection(QtGui.QWidget):
                         FreeCADGui.Selection.clearSelection()  # selected shape will not added to the list
                         message = self.get_item_text(selection) + ' is in reference list already!\n'
                         FreeCAD.Console.PrintMessage(message)
-                        QtGui.QMessageBox.critical(None, "Geomety already in list", message)
+                        QtGui.QMessageBox.critical(None, "Geometry already in list", message)
             else:
                 FreeCADGui.Selection.clearSelection()  # selected shape will not added to the list
                 message = ele_ShapeType + ' is not allowed to add to the list!\n'

src/Mod/Fem/femguiobjects/_ViewProviderFemMaterial.py

@@ -125,7 +125,7 @@ class _TaskPanelFemMaterial:
         QtCore.QObject.connect(self.parameterWidget.input_fd_kinematic_viscosity, QtCore.SIGNAL("valueChanged(double)"), self.kinematic_viscosity_changed)
         QtCore.QObject.connect(self.parameterWidget.input_fd_vol_expansion_coefficient, QtCore.SIGNAL("valueChanged(double)"), self.vtec_changed)
 
-        # init all parameter input fiels with read only
+        # init all parameter input files with read only
         self.parameterWidget.chbu_allow_edit.setCheckState(QtCore.Qt.CheckState.Unchecked)
         self.toggleInputFieldsReadOnly()