[Property Editor] The value for parameter 'X' cannot be null

Our analytics show that a number of the failed apply edit requests in the Property Editor are failing with:

```
The value for parameter 'X' cannot be null
```

It's possible we are incorrectly allowing some properties to be nullable that are not actually nullable.

从发送 apply edit 请求的 Property Editor 流程开始，跟踪 nullable 属性在请求发送前是如何被接受的。复现或检查 issue 中描述的失败，确定哪些属性可以为参数 'X' 产生 null 值，并验证不再允许无效请求。

由索引模型根据 Issue 内容生成。