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());