title: Open mat-expansion-panel ONLY when button is clicked
body: <p>Is there a way in which I can make my mat-expansion-panel open <strong>ONLY WHEN</strong> I click a certain button?</p>
  
  <p>I am thinking of having a list of info that I can click an edit icon on, which would cause the expansion to happen revealing the edit options...</p>
  
  <p>Of course, I do not want the panel to expand when clicking randomly on the row, but only on the edit icon...</p>