Merge PR #29035 into master

Merge PR #29035 into master

* refs/pull/29035/head:
	mgr/pg_autoscaler: changes made reflect jdurgin's request
	mgr/pg_autoscaler: current pg_num compared to distance between the last initial_pg_num
	mgr/progress & mgr/pg_autoscaler: changes reflect liewegas' comment
	mgr/pg_autoscaler: get rid of white space
	mgr/progress: change threshold value to origin
	mgr/progress: cleaning up for pg_autoscaler
	mgr/progress: Added Pg Autoscaler Event

Reviewed-by: Josh Durgin <jdurgin@redhat.com>