added async updater instantiation threshold to be 7500*5 bricks (we can process 7500 bricks/ms in release build) meaning that we want to wait at most 5 ms for any TF-MinMax-Change fixed timings when profiling visibility recomputation
added async updater instantiation threshold to be 7500*5 bricks (we can process 7500 bricks/ms in release build) meaning that we want to wait at most 5 ms for any TF-MinMax-Change
fixed timings when profiling visibility recomputation

git-svn-id: 83c4c97093aeea62ac982fbfd516bf9db27f5c99@2373 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok