Long argument list is unbounded

[mpickering]

For example:

https://mpickering.github.io/eventlog2html/examples/eventlog2html.eventlog.html

We should make it so that for long argument lists there is a scroll bar under the argument list so that it isn't so ugly.

I know that bootstrap does this automatically but milligram doesn't seem to. We probably just need to set the overflow css property correctly.

https://www.w3schools.com/cssref/pr_pos_overflow.asp