added home page link to logo, bottom logo jumps back to top, one logo
at a time on screen, added tooltips to most controls, fixed hover
color for notifications and sound cues controls, cleaned up channel
list appearance, current channel now open, changed icon for expanding
channel info, current channel expanded by default, added toggle for
crossfade and replay gain, consolidated zoom in and zoom out controls
into one control, fixed setting owner with otto.json, app is now less
than half it's previous size, tweaked README