3379 Overflowing text in forms and pre tags

https://code.google.com/p/otwarchive/issues/detail?id=3379

Text inside pre tags wouldn't wrap in Firefox despite the word-wrap on the parent element, so now we're traded pre white-space for pre-wrap. Text inside inbox comments wasn't wrapping in Chrome or Safari, so we've overridden the webkit-specific default min-width of content with 0. Text inside inbox comments wasn't wrapping in Firefox no matter what, so now we just make the form scroll horizontally to keep the filters accessible.