Make loadBg() more readable #3100

Job	Run time
Gather Environments	19s
Build Enviornments (nodemcuv2)	2m 9s
Build Enviornments (esp8266_2m)	2m 13s
Build Enviornments (esp01_1m_full)	2m 14s
Build Enviornments (esp32dev)	1m 27s
Build Enviornments (esp32_eth)	1m 28s
Build Enviornments (esp32dev_audioreactive)	1m 24s
Build Enviornments (lolin_s2_mini)	2m 25s
Build Enviornments (esp32c3dev)	2m 11s
Build Enviornments (esp32s3dev_8MB)	2m 19s
Build Enviornments (esp32s3dev_8MB_PSRAM_opi)	2m 19s
Create Release	0s
	20m 28s

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