Added LiruEnableBuildPrefs, for turning off, when users do not want to use their default build parameters for a few prims, but don't wish to reset them permanently.
This should perhaps end up on the build floater somewhere... but for now, debug only.
Note some of this fix for duplication may be overly cautious, but better safe than sorry.
Added a check for physical default in during creation, so that building at great distances adheres a bit more to build preferences.
Added IsCOA into the build settings, since I'd forgotten, previously.
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