Space Key center the view in 2D and 3D mode.

GLViewer/GLViewer.cpp

@@ -1947,7 +1947,6 @@ void GLViewer::keyPressEvent( QKeyEvent *evt )
     {
         switch( evt->key() )
         {
-            case Qt::Key_Space: centerView(); break;
             case Qt::Key_4:
             {
                 QMatrix4x4 rot;
@@ -2098,6 +2097,7 @@ void GLViewer::keyPressEvent( QKeyEvent *evt )
         switch( evt->key() )
         {
             case Qt::Key_C:  toggleCulling(); break;
+            case Qt::Key_Space: centerView(); break;
             case Qt::Key_Escape:
             {
                 if( isSelectionEnabled() )