fix: TT-20 Calculate time difference when new entries added

Author: wobravo

src/app/modules/shared/components/details-fields/details-fields.component.spec.ts

@@ -541,7 +541,6 @@ describe('DetailsFieldsComponent', () => {
       const timeDiff = component.getTimeDifference();
 
       expect(timeDiff).toBe(param.expectedTimeDiff);
-      expect(timeDiff).toBe(param.expectedTimeDiff);
     });
   });