title: momentjs how to format as 21h:31m
body: <p>I want to convert from seconds to hours and minutes in the following format:</p>
  
  <pre><code>21h:31m
  28h:40m
  20m
  5h
  </code></pre>
  
  <p>I don't want to display seconds nor days, and don't display 0h:30m (only 30m instead) and don't display 1h:0m (only 1h)</p>
  
  <p>is there any way to format this with momentjs?</p>