There are three ways toolbar items can look. You can customize every item and made
        it look unique. You can use either display text, picture or both.
    
        Use the ImageUrl property to specify the URL to the image, which
        the RadToolBarItem will use. If you want the item to display only an image without
        a text, you should set the Text property to an empty string.
    
        Use the ImagePosition property of the RadToolBarItem to specify
        whether the image should be displayed to the left, right, top or bottom of the text.
    
        You can define custom images for the different RadToolBarItem states:
    
        - ImageUrl - used when the item is in its normal state
- DisabledImageUrl - used when the item is disabled (Enabled = false)
- FocusedImageURL - used when the item is focused after tabbing to
            it with the keyboard. 
- ClickedImageURL - used when the left mouse key is pressed over
            the item 
- HoveredCssClass - used when the mouse cursor is over the item
- CheckedCssClass - used when a button checked state is true (applies
            only to RadToolBarButton).