Prevent scrolling the Name column into view when focusing rows in tables

[jpovixwm]

Fixes #179

For browsers that don't support this option, it is technically possible to prevent the scroll by restoring the scrollLeft property after calling .focus(), but this needs to be done on the .torrent-table-rows div, which is two .parentNodes above. I don't really think that's necessary, so I didn't do it.

[qu1ck]

Thanks