Fix 0003092: Problem changing printing prefs.

M print_all_bug_options_update.php

• Fixed a typo in operation successful which caused a string not found error.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2131 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9