User Camera View: missing icons Front, Back, Left, Right, Top, Bottom

Hi guys,
I noticed that the icons related to the Camera orientation of the 'User' Popup Menu choice items are missing.

It seems that these icons are not present in the icons folder.

            ImageUtilities.loadImageIcon("com/jme3/gde/core/icons/user.png", false);
    public static final ImageIcon bottomView =
            ImageUtilities.loadImageIcon("com/jme3/gde/core/icons/bottom.png", false);
    public static final ImageIcon backView =
            ImageUtilities.loadImageIcon("com/jme3/gde/core/icons/back.png", false);
    public static final ImageIcon topView =
            ImageUtilities.loadImageIcon("com/jme3/gde/core/icons/top.png", false);
    public static final ImageIcon leftView =
            ImageUtilities.loadImageIcon("com/jme3/gde/core/icons/left.png", false);
    public static final ImageIcon rightView =
            ImageUtilities.loadImageIcon("com/jme3/gde/core/icons/right.png", false);
    public static final ImageIcon frontView =
            ImageUtilities.loadImageIcon("com/jme3/gde/core/icons/front.png", false);

Start by checking the icons under com/jme3/gde/core/icons and the User popup menu code that loads bottom.png, back.png, top.png, left.png, right.png, and front.png. Confirm which assets are missing and verify that the Camera orientation choices display their icons when the menu is opened.