by Lukáš Uher
Displays editable list with current volume levels. Ability to change volume levels with slider or set all levels from saved presets.
Edit block 4: insert into this array IDs of streams you want to show/set. List of streams is available in block 3.
If you want to show only icons without captions, set 1 instead of 0 in block 53.
Optionally you can edit streams names and icons in blocks 3 and 16.
v2: added flow beginning showing mic&out level meters
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