[Feature request] Auto-save play queue to survive app crash

[gl-dev]

Checklist (Your issue will be automatically closed if you delete this part)

• I make sure that there are no existing issues - open or closed - which I could contribute my information to.
• I believe this feature request will benefit more than 10% of users, not just myself.

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** Description
Auto-save current play queue internally to survive a crash or an app restart.
App crashes much too often during GUI interaction, either due to device rotation or high memory consumption.