title: XML declare padding or margin in one line for all sides
body: <p>I wish there was a way to specify the padding or margin of all four sides in a single line in <code>xml</code> like we do in <code>css</code>.
  For example in css: <code>padding: 1px 2px 3px 4px;</code></p>
  
  <p>Do we have something like this?</p>