the safe filter is quite dangerous - it allows HTML to be rendered as
passed through (the default action is to escape all html), so should
only be used with trusted input. Move it so we only apply it to fields
we specifically expect to have HTML in - in this case, some tables
contain links to other pages.
Also, clean up the variable names for some of these info tables, as they
didn't really make sense.
Following a team cuddle where we checked how different people
interpret the billing report. We found that some things about
the report are ambiguous and that it would be helpful to have
some guidance on the page where the report can be downloaded,
