title: How to expand v-expansion-panel by default with vue/vuetify?
body: <p>I'd like to have an expansion panel <code>&lt;v-expansion-panel&gt;</code> open by default on page load, but cannot figure it out. I know for Angular, you put [expanded]="true", but this doesn't work with Vue. I haven't had luck anywhere finding this answer. I'm not sure if javascript is needed or not, or if it can be done right within the <code>&lt;v-expansion-panel&gt;</code> tag. </p>
  
  <p>I tried <code>&lt;v-expansion-panel [expanded]="true"</code> and it did show the buttons that are in that section, but that's it. </p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;section&gt;
     &lt;v-app&gt;
        &lt;v-expansion-panel
           v-model="search"
           expand
        &gt;
  .
  .
  .
     &lt;/v-app&gt;
  &lt;/section&gt;
  </code></pre>