Change Progress Updates from Counter to Time based

[toshski]

This is a quality-of-life change. It changes the various Progress Messages to be time based (15 seconds) rather than count based.

e.g. after scraping sites, indexing scenes currently updates every 100 scenes, you can get 200 progress messages in a few seconds, because most of your scenes are already indexed. This also clogs up the logs. However, if you clear you your search index and rebuild, then every 100 scenes is more appropriate as it is a lot longer to process as every scenes has to be index.

Time based also better allows for a wide range of machine with different processing speeds.

Progress updates will happen at a default rate of every 15 seconds. The setting can be changed in the database, via the kvs table in the config record where most other settings. Look for the progressTimeInterval entry under the advanced group, it is an existing setting, as time-based updates were used in the Actors mod. I haven't made configurable through the UI, as I assume 15 seconds should suit most and not really need to be changed, but I can add it into the Options UI if needed.