Don't specify table styles for list display

The .bugzilla and .ui-helper-reset classes are useful for table display. However, when using list display, these styles make the resulting list look very out of place in a wiki page. For example, in [this wiki page](https://wiki.mozilla.org/Mobile/Notes/18-Dec-2013#mcomella), the generated list has a border and smaller font; removing those styles makes the list look the same as the other lists.