0004702: [filters] Text searching was not working if the bug had no bugnotes. This code uses a hybrid of the original code which did not search bugnotes at all, mixed with the INNER JOIN code that only searched bugs with bugnotes. This removes the need for a very slow LEFT JOIN.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@3066 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9