title: How to add a delete functionality
body: <p>My app mostly works. The only problem is that when I want to delete a single item, the confirmation dialogue pops up as required and once the "yes" button is selected the app still does not delete the item.</p>
  
  <p>It is getting the correct burger name.  The burger's name was "hshz", quantity is 4 and price is 6.  The log message was:</p>
  
  <pre><code>12-29 05:13:04.963 27316-27316/com.example.omar.burgerinventory D/TEST: Burger name is: hshz
                                                                          Quantity: 4
                                                                          Price: $6
  </code></pre>
  
  <p>The entry data is completely deleted once I hit "yes" on the confirmation dialogue. When I click the entry again, the app crashes. So this means that the data is wiped out but the list item still appears on the list for some reason. So I guess the problem here is that I'm able to delete the data but not clear it from the list.</p>