More fine tuning

I did a bit more fine-tuning of the entire PkgAds system, including:

• Reformatted the "winning bid for ad" email.
  
• Demo users can now change graphic of type "template".
  
• The type icon in the graphics list now includes a link to directly change the graphic.
  
• The PrintClient visible log is now actually containing log lines.
  
• The PrintClient table that displays all the printed ads now update correctly if something changes.
  
• Added "Customer" column to the PrintClient ad table.
  
• The PrintClient table is now color coded, green for printed, yellow for busy, etc.
  
• You can now "retry" to print an ad with PrintClient by right-clicking on the ad and selecting "Retry".
  
• Added "Printed" (yes, not) in the PrintClient ad table.