[2021] New build on Singularity + combat test in M-OEE8

Hey all,

We have just deployed a new build to Sisi. In this patch we re-enabled a performance optimization for the native Mac client, which caused crashes earlier - but now with fixed code, so it should no longer crash.

For testing this we are:

• Extending the native Mac play test slightly until tomorrow
• Have an informal test this afternoon (2021-08-16) at 17:00 EVE-time - just FFA combat in M-OEE8.