title: Jira Summary contains text filter
body: <p>I need to filter issues whose title (Summary attribute?) contains a text "<code>config</code>". So what I did is:</p>
  
  <ol>
  <li>More->Summary</li>
  <li>Enter the text "<code>config</code>"</li>
  </ol>
  
  <p>But for some reason I only got issues whose title contains "<code>config</code>" or "<code>configs</code>". I didn't get the issues whose title contains e.g. "<code>configuration</code>". What's wrong?</p>