Viewing/scrolling in post when excessive code block length causes issues

Mainly performance issues, as the post is barely scrollable, if at all. I ended up moving a log someone had to pastebin.com as it was making the thread and post unreadable with being unable to scroll the page.

This isn't really a "bug", but should probably limit code block length if possible, especially since they are intended for snippets. Logs and other lengthy text files should use pastebin.com or attachments eventually.