title: How can I add a new CSS class to <ul> tag?
body: <p>I want to assign a new CSS class to default <code>&lt;ul&gt;</code> widget in Page/Post creating page in wordpress. How can I do this? </p>
  
  <p>See the image below.</p>
  
  <p><img src="https://i.stack.imgur.com/BAkhY.png" alt="enter image description here"></p>