<p></p>
<h3>Description</h3>
<p>I tried to export my BSQ tx on Regtest and it failed with a NPE.</p>
<h4>Version</h4>
<p>v1.5.5</p>
<h3>Expected behaviour</h3>
<p>CSV is exported</p>
<h3>Actual behaviour</h3>
<p>NPE is thrown:</p>
<pre><code>java.lang.NullPointerException
        at com.googlecode.jcsv.writer.internal.CSVColumnJoinerImpl.joinColumns(CSVColumnJoinerImpl.java:30)
        at com.googlecode.jcsv.writer.internal.CSVWriterImpl.write(CSVWriterImpl.java:38)
        at com.googlecode.jcsv.writer.internal.CSVWriterImpl.writeAll(CSVWriterImpl.java:29)
        at bisq.desktop.util.GUIUtil.exportCSV(GUIUtil.java:293)
        at bisq.desktop.main.dao.wallet.tx.BsqTxView.lambda$activate$3(BsqTxView.java:247)
</code></pre>
<p>It failed in my case as I had an item where the address was <code>null</code> instead of "".<br>
Maybe we shouldn't print the address at all as it is never populated. I think this might be a copy&paste issue <g-emoji class="g-emoji" alias="wink" fallback-src="https://github.githubassets.com/images/icons/emoji/unicode/1f609.png">😉</g-emoji></p>
<h3>Screenshots</h3>
<p><a target="_blank" rel="noopener noreferrer" href="https://user-images.githubusercontent.com/170962/105487899-1ec31400-5cb1-11eb-8111-04d4b476c746.png"><img width="1272" alt="Bildschirmfoto 2021-01-22 um 11 52 39" src="https://user-images.githubusercontent.com/170962/105487899-1ec31400-5cb1-11eb-8111-04d4b476c746.png" style="max-width:100%;"></a></p>
<h4>Device or machine</h4>

<h4>Additional info</h4>


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