Prepare for new site.
Fixed saveKey getting unset and some MOC threading issues.

[FIXED]     Don't unset saveKey when loading the key fails.
            This causes saveKey to fail as soon as it's synced to a device that hasn't saved the key yet.
[FIXED]     A bunch of threading violation issues with thread-confined MOCs.
Store loading and locking modal alerts.

[ADDED]     Waiting until the store is loaded.
[UPDATED]   Hide or lock password window when locked.
Alert display issues fixed.

[FIXED]     Alert display issues.
[FIXED]     Access to activeUser from a different thread.