如何让 Table 组件的列固定宽度？

#### 实现场景：
希望渲染出 Table 后，表头每一列的宽度不会再被改变。

#### 存在的问题：
设置表格每一列的 `fixed` 属性（例如 `left`）后，相邻两列之间仍会出现一个 `

#### 当前方案：

```json
{
"type": "table",
"columns": [
{
"label": "Category",
"name": "category",
"type": "text",
"width": "5%",
"align": "center",
"fixed": "left"
},
{
"type": "text",
"label": "Title",
"name": "title",
"labelClassName": "text-center",
"fixed": "left"
},
{
"type": "text",
"label": "Duration",
"name": "duration",
"width": "5%",
"align": "center",
"fixed": "left"
},
{
"type": "text",
"label": "Size",
"name": "size",
"width": "5%",
"align": "center",
"fixed": "left"
},
{
"type": "text",
"label": "Seeders",
"name": "seeders",
"width": "5%",
"align": "center",
"fixed": "left"
},
{
"type": "text",
"label": "Leechers",
"name": "leechers",
"width": "5%",
"align": "center",
"fixed": "left"
},
{
"type": "text",
"label": "Completes",
"name": "completes",
"width": "5%",
"align": "center",
"fixed": "left"
},
{
"type": "text",
"label": "Uploader",
"name": "uploader",
"width": "8%",
"align": "center",
"fixed": "left"
}
],
"source": "${torrents}"
}
```

Start by reproducing the provided Table configuration and inspect the Table implementation that creates the cxd-Table-content-colDragLine element and handles fixed columns. Determine how fixed columns currently permit resizing; done means fixed columns cannot be drag-resized while the expected behavior for other columns remains unchanged.

Written by the indexing model from the issue text.