Printing from "view checklist" should print just the checklist

[kalotay]

Currently printing is done using window.print() which means the whole page is printed including the navbar and other navigational elements. It is probably better to print just the list (and the title). Note: the behaviour is correct if one prints from a chacklist list i.e. only the checklist is printed.

There is a reason for this inconsistent printing behaviour. It is thought that people might want to partially complete a checklist on a computer, print it and then complete the missing parts on paper. Printing from checklist lists only prints blank forms as it regenerates the HTML form the checklistDSL for every printing.