Compass JSON import object with number as keys results in array of strings

Problem Description

.json file having below document,

```

{

  "data": {

    "plans":

{       "1": "14",       "2": "20",       "3": "40"     }

  }

}

```

When we import this file in specific collection by selecting JSON import, It converts object in to array of strings, like below:

```

{ "plans": [null, "14", "20", "40"] }

```

Steps to Reproduce

Open Compass > Connect DB > Select Collection / Create Collection > Click on Add Data button > Select Import File > Popup will open > Select File > Select input file type as JSON > Click on Import button

Expected Results

```

{

  "data": {

    "plans":

{       "1": "14",       "2": "20",       "3": "40"     }

  }

}

```

Actual Results

```

{ "plans": [null, "14", "20", "40"] }

```

Additional Notes

When i import this with `mongoimport` command in mongo shell it is working perfectly,

```

> mongoimport --db dbName --collection collectionName <fileName.json

```