BHV-5999: Flip arrows on playback controls

DCO-1.1-Signed-Off-By: Kunmyon Choi kunmyon.choi@lge.com
Merge pull request #1290 from enyojs/BHV-5999-kunmyonchoi-master

BHV-5999: Flip arrows on playback controls

Looks good!

Reviewed-by: Aaron Tam (aaron.tam@lge.com)