indexargs_url force ids to int ids appear as hyperdb.String instances, which confused indexargs_url when they appear in the filterspec. They need to be treated as treated as integers when generating URLs. It feels sort of hacky to check for 'id' like this but I'm at a loss for what else to do in this case. Suggestions are welcome :) Maybe we should look into using some other hyperdb class to represent ids? this fixes [SF#783492] Some trailing whitespace also got trimmed.

Name: minimal
Description: This is an empty tracker - it must be customised for it to be
             useful! It only defines the bare minimum of information - the
             user database and the two default users (admin and anonymous).
             The rest is entirely up to you! Not recommended for first-time
             Roundup users (it's easier to tweak the Classic tracker).
Intended-For: Roundup experts who need a clean slate to start with.