Fixed non-repeating background, wrong width of home page and scrollbar

If you access the ticket-monster in a web browser, resize the window and use the bottom scrollbar to move right, you can see that the background is missing. This pull request fixes it + as a side effect it fixes incorrect width of the main page.

The second commit sets the left scrollbar visible always even when it isn't necessary. A lot of other pages do the same (e.g. github), because it looks ugly when the content of the page changes in a way that the scrollbar appears/disappears when it is/isn't needed.