Changes

:*You can use custom sound file for PPSSPP UI and game list navigation feedback sounds [https://github.com/hrydgard/ppsspp/issues/13225#issuecomment-776396995 with this pull request]. Also you can use custom sound file for RetroAchievement notification sounds [https://github.com/hrydgard/ppsspp/pull/17725 with this pull request], for setting these up you need to set "Settings> UI Sounds: On" and you can set "UI Background animation: Waves" and "Theme: Default", after these you need to change .wav files from "\PPSSPP-dev\assets" with your custom ones. Also there is a [https://github.com/hrydgard/ppsspp/issues/18393 feature request] for [https://www.youtube.com/watch?v=PlFkIjbWg2M intro sound] implementation to PPSSPP UI similar to XMB.:*PPSSPP supports music playback when a game selected in the menu screen [https://github.com/hrydgard/ppsspp/pull/6393 with this pull request] similar to XMB, but currently [https://www.youtube.com/watch?v=WIQe8-wdC0g&t=98s there is no video support] on this screen for PPSSPP UI as "hrydgard" mentioned in that pull request. Also there is a [https://github.com/hrydgard/ppsspp/issues/18393 feature request] for [https://www.youtube.com/watch?v=PlFkIjbWg2M intro sound] implementation to PPSSPP UI similar to XMB.