title: Button with MahApps style show only lower case latters
body: <p>This is my Button:</p>
  
  <pre><code>&lt;Button
      Name="btnOk"
      Content="OK"
      Style="{StaticResource AccentedSquareButtonStyle}"/&gt;
  </code></pre>
  
  <p>And the <code>content</code> is always with lower case latter when using this <code>Style</code> </p>