Improve responsive pagination location and fix page-jump title

After the recent new pagination style rewrite, a few issues were overlooked. The proposed improvements are:

1) Fix incorrect title attribute on page-jump input element
2) Remove empty value attribute on page-jump input element
3) Use input type="number" for page-jump
4) Reduce the number of page elements in the topic-row pagination
5) Reposition topic-row pagination on the same line as "replies", thereby giving more room to the last-post info.