* Move the startup application settings to a new class
* Replace settings methods with static fields
* Move Redis and ES configuration to the settings class
* Fix environment python imports
* Update envcheck to use the new settings
* ES Client must bootstrap itself to be the source of config
If this is not done a cyclic loop is created between the config loader and the ES client.
This lays the ground work for ES being the source of all app config.
* auto_download is not used anymore
* Add UserConfig class that encapsulates user config storage
This class will allow the rest of the code to 'not care' about how user properties are stored.
This requires the addition of a ta_users index in ES.
* Create migration task for user config transfer
* Replace getters and setters for each property
Strongly type the user configuration
Migrate missed sponsorblock ID
* Other DB settings will be another PR
Clark
simon