3.0 Role lock

Role lock balance

New features:

• New balancing algorithm for role lock mode;
• Balancing algorithm selection in settings (role lock or classic);
• Reworked settings dialog with new options for role lock mode;
• Support for new ranked system with separate rating per role (since season 18). Both manual and automated stats editing (via OWAPI). Also changed import and export formats;
• Instant switching between role-lock and classic view;
• Show spinner while calculating balance. Role lock balancer could take significant time (up to minute);

Other changes:

• Lowered balance threshold. Multiple balance rolls will show less balance variants, but with better quality;
• Bugfixes and optimisations;

Hero changes

• Added sigma;