Show region hashcode when profiling

Signed-off-by: Ross Allan <rallanpcl@gmail.com>
Revert "Revert "Revert to normal markTileEntityForDespawn behaviour" - it seems that this was of no benefit, and possibly even causes IC2 enet issues" - this reversion may've broken IC2 again, should've done more
testing. Sorry :(

This reverts commit 7fbdbb4ff9cad6a548f4fbe050aab2a898dc1c62.