v0.8.920

!!! a full update with Sketch data upload is required. After updating please press CTRL+F5 in browser !!!
Please backup playlist.csv and wifi.csv before updating.

• fixed bug with displaying horizontal scroll in playlist
• fixed compilation error with IR_PIN=255
• libraries async-mqtt-client, AsyncTCP, ESPAsyncWebServer moved to the project
• new parameter #define XTASK_MEM_SIZE - buffer size for AsyncTCP task (4096 by default)