PATH-702: Positioning the rebake navmesh button to align with the Stand/StopFlying buttons.  Also, parenting the buttons to the toolbar UI elements.

EXP-1942: BUGFIX Ensuring to clear the flag indicating that maturity changed during teleport when the maturity level change fails.

EXP-1942: Ensuring that the teleport cancel works in the case of restarting a teleport.  Also, ensuring to pull down the teleport screen if we time out of a maturity request with a pending teleport queued.

EXP-1942,EXP-1945: Pulling down the teleport screen in the scenario of waiting for a maturity preference change that is still being posted to the server.

EXP-1942,EXP-1945: Ensuring that the teleport process waits for the maturity preferences to be synced between viewer and server.

EXP-1942, EXP-1945: Improved handling of the maturity preference change response. Still needs work though.

EXP-1942,EXP-1945: Altering behavior when setting maturity preference to check the server response in an effort to ensure the viewer and server remain in sync.  This is a partial commit as I still need to add user behavior and notifications when things go wrong.

EXP-1948: Ensuring that we show the maturity changed notification in the case of a teleport failure on the second attempt.

Removing some code that allowed the viewer to toggle the user's maturity access level.  But only toggling it in the viewer leads to some really bad discontinuities with the server's actual access level for the user.

EXP-1940: BUGFIX Correcting issue with changing maturity setting and teleporting from dialog did not work on agni.  Problem stemmed from 2 issues.  1) The server responded with different results between aditi and agni due to some changes in the Pathfinding project.  2) The viewer was actually sending two separate requests to change to the same preference setting.  This fixes both issues.

EXP-1928: Constructing the new maturity preferences flow for the case of a teleport via lure (which cannot be restared).

EXP-1928: Handling the rare case that the user preferences cannot be successfully changed, and reporting that to the user.

EXP-1928: Removing ability to restart a teleport via lure because the re-attempt will fail on the server.

EXP-1928: First pass at building the functionality to restart teleport after increasing the maturity preference level to match the intended teleport region.  There are probably still some cases that are broken and bugs.

EXP-1928: Adding fundamentals for managing a teleport request in such a way that it can be restarted.

Move phase tracking to its own set of classes inside LLViewerStats - simplifies llvoavatar and allows adding such tracking to classes that live outside the avatar lifetime

Removing unneeded code because we have the pathfinding console working to correctly when teleporting or crossing region boundaries.

Prevents the avatar's baked texture UUIDs sent by the server's first objectUpdate
message from being overwritten until the wearable cache results come back.

Cleaning up miscellaneous differences between the pathfinding repository and the latest viewer-development.

SH-3044 FIX - change avatar log message to LL_DEBUGS to allow effective toggling when default is INFO

path-405: Avatar is no longer frozen when pathing window is up and when avatar crosses a region boundary the resident is informed with a message in the pathing window.