New DSP UI widget mode: Waveform only with/without album art in background
* Use signal for Alarm if music is playing during the Alarm time
! Fixed:
- FLAC file reading could be stopped due to bitstream errors inside the file
- playback button does not change state to Stop if streaming to UPnP/Chromecast and breaking it by pressing the icon
- rare crash in UI
- reverted to max 8 I/O channels