- don't sync/start change tracking for new/loaded scene before Sync/AutoSync is pressed
- set Cache Dir on new/reset/load
- disable autosync after reset/load
- scene vendor in udatasmith
- fixed ProgresBar messed stage index
- retired maxscript dialog
- extra AutoSync maxscript functions - Datasmith_IsAutoSyncEnabled, Datasmith_SetAutoSyncIdleDelay
#jira UETOOL-4744 UETOOL-4377
#rb benoit.deschenes
#ROBOMERGE-AUTHOR: kerim.borchaev
#ROBOMERGE-SOURCE: CL 18386539 in //UE5/Release-5.0/... via CL 18386549
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v896-18170469)
[CL 18386557 by kerim borchaev in ue5-release-engine-test branch]
- also scene is not parsed/updated until first Sync command
#jira UE-135343
#rb benoit.deschenes JeanLuc.Corenthin
#ROBOMERGE-AUTHOR: kerim.borchaev
#ROBOMERGE-SOURCE: CL 18295671 in //UE5/Release-5.0/... via CL 18295683
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v895-18170469)
[CL 18295692 by kerim borchaev in ue5-release-engine-test branch]
This represents UE4/Main @18073326, Release-5.0 @18081140 and Dev-PerfTest @18045971
[CL 18081471 by aurel cordonnier in ue5-release-engine-test branch]