CSS is not automatically livesynced in angular apps

[pkoleva]

1. Create an angular app, add platforms and navigate to its folder
2. Run tns livesync
3. Change one property in a class in app.css //e.g. -> .title{ font-size: 5; margin: 20;}

Expected result: Page is reloaded and the change is applied
Actual result: Page is reloaded but the change is not applied