MAINT-1413,MAINT-1425,MAINT-1426: BUGFIX Correcting a problem where the build/edit floater was being dirtied at the wrong time.

PATH-856: Adding a new notification to indicate when the user will be toggling the phantom flag of a linkset through the Pathfinding Linksets floater.

PATH-854: Adding support to display whether linksets are scripted or not in the pathfinding linksets floater.

PATH-849: Group objects were losing their [group] identifier following the last commit.  This should fix that issue.

PATH-849: Refactoring the behavior after loading the owner name of a pathfinding object into the avatar name cache so that each object can simply update its respective row in the scroll list rather than rebuilding from scratch after all names are loaded.

PATH-852: BUGFIX Adding the custom pathfinding cursors to the mac and linux builds as apparently they never worked there.

PATH-849: CRASHFIX This should fix the crash caused by LLPathfindingObject::handleAvatarNameFetch being called after the corresponding LLPathfindingObject has been deleted.

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.

MAINT-515 FIX, CHOP-100 FIX - technically we are avoiding these issues rather than fixing them; changing llcommon to be statically linked avoids the symbol issues with llcommon.dll

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