Update anaconda default design models to set CentOS symbol and CentOS
    release brand proportion 1:2 using height as reference. 
    
        - This is, the CentOS symbol is always at 48x48 pixels and the
          CentOS release brand (with or without phrase) is always 96
          pixels height. The width of CentOS release brand is calculated
          automatically to fit the correct image ratio.
    
        - This convenction is true for all distribution artworks where the
          CentOS symbol and CentOS release brand are visible in the same
          area.
    
        - Another design convenction is the position of CentOS symbol and
          CentOS release brand. The CentOS symbol is always on top and
          CentOS release-brand is on bottom, they both aligned to left.