PATH-842, VWR-29431: BUGFIX Correcting a regression introduced by the fix for PATH-542.  The viewer calculated rotation resulting from an object's angular velocity was being incorrectly reset when the corresponding object update was received.  With this bugfix, the rotation resulting from the angular velocity is accumulated separately and is re-appplied when the object update resets the object's rotation.

Path-643. Once the preferences panel is closed (either through ok or cancel), the pathing console rebuilds the gfx data.

MAINT-1175 FIX Severe performance issues on 3.3.2 (258114) Release and 3.3.3 (259197) Beta in "Add scroll list item"
removed linear scan for namelist items and used weak reference (LLHandle) instead

Not all appearance messages on a region will be new or old style at all times.
Thus we're using a specific flag to mark the new appearance messages.