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Merge pull request #1203 from raven02/patch-10

Show upto 8 recent item for Android/iOS
Merge pull request #1200 from unknownbrackets/threadqueue-perf

Improve threadqueue performance
fragment shader: RGBA DECAL does make more sense this way
Optimize resched with a running thread.

Esp. if it would go back to itself.
Don't save vregs for threads that don't use them.