title: OpenRefine text transform unique() ignoring case
body: <p>Is there a way to tell uniques() to ignore case?</p>
  <p>I have a GREL that runs like</p>
  <pre><code>forEach(value.split(&quot;,&quot;),v,v.trim()).uniques().join(&quot;,&quot;)
  </code></pre>
  <p>This takes each value in the cell seperated by commas, and then spits out the unique value/s in that cell. Works great however if I have a cell that contains
  Paul, PAUL it will return both rather than just 'Paul'.</p>
  <p>Is it possible to cast all the values temporarily to uppercase to compare and then return the first spelling you had of a unique?</p>