WLED Release 0.15.3

This is a maintenance release for the 0.15.x series of WLED.

This release is basically 0.15.2 plus a hotfix for the esp8226 and GPIO pin 3 issue

What's Changed

Backport fix ESP8266 DMA off-by-one to 0.15 by @willmmiles in https://github.com/wled/WLED/pull/5139
0.15 - Replace #5138 with upstream NeoPixelBus fix by @willmmiles in https://github.com/wled/WLED/pull/5148
Audioreactive minor bugfix - avoid crash caused by -D SR_DMTYPE=-1by @softhack007 in https://github.com/wled/WLED/commit/d9831f6335a06f31a49d0383610b99485016a692

It's focus is on big fixes and greater safety around upgrades

Bugfix for brightness factor upon save: fixes #4824 by @DedeHai in https://github.com/wled/WLED/pull/4827
0.15 - updated AsyncWebServer and AsyncTCP by @willmmiles in https://github.com/wled/WLED/pull/4834
(0.15.2 backport): Make version information consistent across update interfaces by @Arcitec in https://github.com/wled/WLED/pull/4849
(0.15.2 backport) Fix broken Sync button after 0.15 refactor by @Arcitec in https://github.com/wled/WLED/pull/4845
fix ancient UI bug that hides the speed slider in percent FX 0.15 edition by @DedeHai in https://github.com/wled/WLED/pull/4914