title: Smart-Table "st-sort" not working
body: <p>I'm using angular v1.3.15. I'm fetching data by hitting an api and passing it through the scope to the smart table like so</p>
  
  <p><img src="https://i.stack.imgur.com/snwcT.png" alt="enter image description here"></p>
  
  <p>Here is the data format of the 'scope.rowCollection' as seen on the console</p>
  
  <p><img src="https://i.stack.imgur.com/yd2To.png" alt="enter image description here"></p>
  
  <p>Data populates fine but When i'm trying to click on the table-header and sort it using st-sort method, the table values go blank clearly not sorting the column. Here is a view of my html snippet</p>
  
  <p><img src="https://i.stack.imgur.com/QyjPw.png" alt="enter image description here"></p>
  
  <p>Can you please tell me what exactly am i doing wrong. The moment i use my own data collection set(NOT hard coded) the whole table values go haywire.
  I have a feeling its something to do with the variable names that i'm using on the angular end. 
  Any help is much appreciated....Thanks</p>