title: Change padding of vuetify v-expansion-panel-content
body: <p>I have multiple casceded v-expansion-panels to visualize a folder sturcture. Like in this example with items and innerItems</p>
  
  <pre><code>  &lt;v-expansion-panels
       accordion
       focusable
    &gt;
       &lt;v-expansion-panel
          v-for="(item, x) in items"
          :key="x"
       &gt;
          &lt;v-expansion-panel-header&gt; {{ item.header }}&lt;/v-expansion-panel-header&gt;
          &lt;v-expansion-panel-content class="v-expansion-panel-content"&gt;
             &lt;v-expansion-panels&gt;
               &lt;v-expansion-panel
                  v-for="(innerItem, y) in innerItems"
                  :key="y"
               &gt;
                  &lt;v-expansion-panel-header&gt; {{ innerItem.header }} &lt;/v-expansion-panel-header&gt;
                  &lt;v-expansion-panel-content&gt; {{ innerItem.content }} &lt;/v-expansion-panel-content&gt;
                 &lt;/v-expansion-panel&gt;
              &lt;/v-expansion-panels&gt;
          &lt;/v-expansion-panel-content&gt;
       &lt;/v-expansion-panel&gt;
    &lt;/v-expansion-panels&gt;
  </code></pre>
  
  <p>So I get this</p>
  
  <p><a href="https://i.stack.imgur.com/DEAn1.png" rel="noreferrer"><img src="https://i.stack.imgur.com/DEAn1.png" alt="enter image description here"></a></p>
  
  <p>But I need the inner expansion-panel to be on the right side like this</p>
  
  <p><a href="https://i.stack.imgur.com/tvIwp.png" rel="noreferrer"><img src="https://i.stack.imgur.com/tvIwp.png" alt="enter image description here"></a></p>
  
  <p>I achieved this by editing the .v-expansion-panel-content__warp in the browser editor (just to get what I want it to look like) but how can I get access to this self generated div/css-class</p>
  
  <p><a href="https://i.stack.imgur.com/xRRWr.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xRRWr.png" alt="enter image description here"></a></p>
  
  <p>There is already a question regarding the panel-header (<a href="https://stackoverflow.com/questions/54967794/stylization-vuetify-component-v-expansion-panel-header">Stylization vuetify component v-expansion-panel__header</a>) but I dont get this question or the answer...</p>
  
  <p>Maybe someone can point me in the right direction or had the same problem and can show me a way to fix this!</p>
  
  <p>Thanks! </p>