Added configuration flags ($g_show_queries_count and $g_show_queries_list)
that track the executed queries and display their total count, unique queries
count, and the actual list of queries executed.

Some examples of query counts:
view_bug_page: 68 total, 24 unique.
view_bug_advanced_page: 66 total, 22 unique.
report_bug_advanged_page: 53 total, 34 unique.
report_bug_page: 26 total, 13 unique.
summary_page: 226 total, 214 unque.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1157 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9