Model management UI

[jun665]

在webui中，Lora等模型会被识别为很多按钮，当模型数量变大时，通过目录层次来分类是不可避免的，这时会出现满屏的按钮而使寻找变得困难，使用tree结构来浏览模型是不是更好一点，如我在本地改造的这样。

In the webui, models such as Lora will be recognized as many buttons, when the number of models increases, it is inevitable to classify them by directory level, then there will be a full screen of buttons and it will be difficult to find, is it better to use the tree structure to browse the model, as I modified locally.