Fix: 0007912: Time tracking doesn't work- SQL syntax error

It would appear modifying these two queries a) to add an order by bug_id and b) add extra group by fields fixes this for mssql.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@4470 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9