title: MomentJS is sometimes adding the wrong amount of hours
body: <p>So what i'm simply trying to achieve a feature where i add X.X amount of hours to a 24h time. The issue is for the time 00:00, an incorrect amount of hours is added</p>
  
  <p>The code i wrote works for the most part. It works for every possible time except 0:00.
  If i have 01:30 and i add 1h it gives me 02:30. If I have 02:30 and i add 1.5h it gives me 04:00.</p>
  
  <p>So heres this issue. When i have 00:00 and i add 1h i get 01:06...seems to make no sense and i was hoping someone with more momentJS experience might have some thoughts or ideas on the matter. Heres the code</p>
  
  <p>If i have 00:00 and have 3.5 i get 03:06. This all only seems to happen when i start with 00:00. Kind of driving me crazy</p>
  
  <pre><code>console.log(timesheetRows[i][p]); //prints 0:00
  console.log(Number(hours)); // prints 1
  timesheetRows[i][p] = moment.utc(timesheetRows[i][p], 'hh:mm').add(Number(hours), 'hours').format('HH:MM');
  </code></pre>