title: Add custom keyboard shortcuts to VS Code Jupyter extension
body: <p>Is there a way to add custom keyboard shortcuts to the <code>VS Code Jupyter</code> extension?</p>
  <p>To give you some context, I wanted to change the <code>CopyLinewsDownAction</code> from <code>Alt+Shift+Down</code> to <code>Ctrl+Shift+d</code></p>
  <p>I was able to change the keybinding for most of the editors with</p>
  <pre><code>{
    &quot;key&quot;: &quot;ctrl+shift+d&quot;,
    &quot;command&quot;: &quot;editor.action.copyLinesDownAction&quot;,
    &quot;when&quot;: &quot;editorTextFocus &amp;&amp; !editorReadonly&quot;
  }
  </code></pre>
  <p>but this does not change the shortcut in the notebooks.</p>
  <p>I tried also to change the keybinding</p>
  <pre><code>{
    &quot;key&quot;: &quot;shift+alt+down&quot;,
    &quot;command&quot;: &quot;notebook.cell.copyDown&quot;,
    &quot;when&quot;: &quot;notebookEditorFocused &amp;&amp; !inputFocus&quot;
  }
  </code></pre>
  <p>but without success.</p>