System and performance

Erissa: Please post your feedback regarding the system and performance here. Thanks!    - Decrease in performance when displaying some vehicles in HD quality fixed.
- Performance of shadow rendering and the quality of rendered shadows improved.
- Performance of frame rendering on most configurations slightly improved.
- Performance of some elements of the battle interface optimized.
- Option to turn the triple buffering off/on is now available again in the Graphics settings menu.
- Issue with graphical artifacts appearing upon screen resolution change fixed.
- Some hang-ups and crashes of the game client fixed.