6 column limit in list scaffold view is very simplistic

6 column limit in list scaffold view is very simplistic and confusing. naught, naughty magic number.

1. either remove the limit entirely in the list.gsp template,
2. replace the 'magic number' with a variable name which explains it,
3. or my favourite - raise the limit to 10 and if the limit is reached in the template, have a visual representation on the page which indicates there are more fields which exist, but are not being shown due to display limits - see patch for what I mean. needs a bit of clean up though.

The problem with the patch as submitted is that it does not generate a column in the table which matches the css of the rest of the table.

http://www.nabble.com/field-limit-of-6-on-list.gsp--td13050982.html#a13071779