Expose and use site locked config to bypass redirects

Cleanup some unused and redundant auth functions.
Fix SlotAsset.fileName own == auth redundancy
Can change email without changing pw. Fixes #1920
partyEdit - on account page, clear pw fields after successful save
slight changes to prev
fix. oops. #1920
force cache clear after asset changes thru VolumeEditMaterialsForm. Fixes #2040