Quality Update In Progress

In the quality update, the following functions are expected to appear
1. All items will add quality levels, and items of different quality levels will not stack
2. The default quality level is 0
3. The same items of different quality levels are refined into items of other quality levels according to certain rules
4. Items of different quality levels can be purchased in the shop, and the default is the minimum quality level that meets the standard
5. The higher the quality level of the item, the higher the value
6. Combine quality level changes according to certain rules
7. New quality skill, production, drops, etc. are related to this upgrade
8. The number of dropped items has been reduced, which is converted into dropped items of the corresponding quality level
9. The quality level will be displayed in the shop, backpack. You can set whether to display it in the settings menu
10. Added an independent sorting, sorting by quality level