Patch of Improvements and Fixes

• Individual Arena: the arena is now exclusive to each player and automatically resets every new day.
• Upgrade Balancing: the upgrade limit was reduced from 5 to 3 (from 8 to 5 for Mindbreakers). Bags and accessories can no longer be upgraded.
• Visual Enhancements: several visual improvements were applied for a more polished experience.
• Premium Benefit: premium users now receive double the boxes.