fix(Examples): Fix visual glitch for hacker_news_pwa.
fix(Examples): Fix visual glitch for hacker_news_pwa.

Closes #925

PiperOrigin-RevId: 187062385

chalin/angular2,chalin/angular2,matanlurey/angular,matanlurey/angular,angulardart/angular,angulardart/angular,kevmoo/angular,kevmoo/angular,angulardart/angular,kevmoo/angular,chalin/angular2,matanlurey/angular