Configure autoRefresh for mappings in Cocoda, not per registry

[stefandesu]

Currently, each mapping registry can have the property autoRefresh. This shouldn't be defined inside each registry, but rather for all mapping registries. Also, the user should be able to disabled auto refresh.

[stefandesu]

@nichtich What do you think, should auto refresh be configured for the Cocoda instance or as a user setting? Right now, I set it to 10 seconds for registries with stored mappings, but I think it should either by configurable or in the settings.

[nichtich]

Time in seconds should be configurable per Cocoda instance but users should be able to disable auto-refresh.

[stefandesu]

This is now configurable in config (with default values in cocoda.default.json) with a possible override from the user in MappingBrowser settings.