Peter Osterlund 7c75c83859 Set engine strength using Elo value
Remove the Strength preferences setting.

Add a new left drawer menu item to set the current engine strength in
terms of Elo. Supported for all engines that implement the standard
UCI options UCI_LimitStrength and UCI_Elo.

Elo settings are remembered individually for each engine.
2020-04-19 22:37:19 +02:00
..