LN (EKU_TLS) is more likely to be present thus should be checked first

This reverts commit 92499ce1.

# Conflicts:
#	indra/newview/llinventorybridge.cpp
#	indra/newview/llinventorypanel.cpp
#	indra/newview/llinventorypanel.h

This reverts commit 25fd4c2b.

Callstack is clearly broken since it points to LLNotifications::instance().clear(); after 'Goodbye!', my suspicion is that something reinitialized singleton so I fixed cleanup and added some logging to see if there is a dupplicate init

LLWorld is supposed to first remove region from list, then delete the region, but in case of this crash region was returned by handle from llworld yet was mDead and cleaned up, all in main thread.

Coroprosedure should stop on 'stop' exception

following promotion of DRTVWR-501

to reflect previous commit and use correct pool size

following promotion of DRTVWR-476

This reverts commit bf999f2f due to revert of updater, this will be moved to separate 'epic' instead

This fails at teamcity due to missing LLTrans, but builds locally without issues. Reverting to not hold D501

This reverts commit 31d9930a.

Nat's suggested improvement to LLThreadSafeQueue that takes account of queue being empty as well as the status flag condition