A title tip and mouse icon does not appear when hovering over the column name. In fact you don't even know that you can sort the column until you look at the template code. Perhaps this is intentional
Can not patch the file database-view.vm file because svn reports this to be a binary file.
I changed line 37 to,
<div align="center"><a href="#" title="Sort $column" onClick="window.location.href='$columnLink';return false;" style="color: white;">$column</a></div>