fix controls flying downward on transition
fix controls flying downward on transition

only transition player controls opacity, not all

yciabaud/webtorrent-desktop,webtorrent/webtorrent-desktop,feross/webtorrent-app,webtorrent/webtorrent-desktop,feross/webtorrent-app,webtorrent/webtorrent-desktop,feross/webtorrent-desktop,yciabaud/webtorrent-desktop,feross/webtorrent-desktop,michaelgeorgeattard/webtorrent-desktop,michaelgeorgeattard/webtorrent-desktop,feross/webtorrent-app,feross/webtorrent-desktop,michaelgeorgeattard/webtorrent-desktop,yciabaud/webtorrent-desktop