add seekbar for hls playback
add seekbar for hls playback

MariadeAnton/clappr,tarkanlar/clappr,kelonye/clappr,kelonye/clappr,kelonye/clappr,wxmfront/clappr,leandromoreira/clappr,Metrakit/clappr,tjenkinson/clappr,wxmfront/clappr,clappr/clappr,clappr/clappr,burakkp/clappr,dayvson/clappr,tarkanlar/clappr,shakin/clappr,Pyrotoxin/clappr,wxmfront/clappr,burakkp/clappr,Peer5/clappr,shakin/clappr,Peer5/clappr,irongomme/clappr,burakkp/clappr,flavioribeiro/clappr,dayvson/clappr,Metrakit/clappr,MariadeAnton/clappr,tjenkinson/clappr,dayvson/clappr,jfairley/clappr,tjenkinson/clappr,leandromoreira/clappr,clappr/clappr,flavioribeiro/clappr,flavioribeiro/clappr,Pyrotoxin/clappr,shakin/clappr,jfairley/clappr,tarkanlar/clappr,jfairley/clappr,Peer5/clappr,Metrakit/clappr,leandromoreira/clappr,irongomme/clappr,MariadeAnton/clappr,Pyrotoxin/clappr,irongomme/clappr