Cancel Container Edit Sensitizes Update (#1168656)
    
    Settings" button in the custom partition screen would
    activate after a user attempted to create a new volume and then
    pressed the cancel button. This patch removes the double event
    handler which had the unintended side effect of setting the
    sensitive property to True no matter what happened in the
    container editor dialog box.
    
    Resolves: rhbz#1168656