Bring back the old icons

[YiqiXu]

After months of testing, I have reached a partial conclusion that the breeze-style icons can be misleading in many cases. The oversimplified design may not accurately convey certain functions, e.g. see the icon set properties. Therefore, it is important to provide an option for users to choose between the old and the new icons. This way, users can opt for the design that best suits their preferences and needs.

[da-liii]

It is reasonable.