Collapse single row sheets

Remove the wrapping element of a sheet that has only one row (not including the keys row).

This is similar to unwrapping single row sheets but does not place sheet fields in the root JSON or XML element directly.

Example:

Sheet name: Character

Name	Age	Role
Cid	25	Fighter

Default Output:

JSON:

{
  "Character" : {
    "Cid" : {
      "Name":"Cid",
      "Age":25,
      "Role":"Fighter"
    }
  }
}

XML:

<data>
  <Character>
    <Cid>
      <Age>25</Age>
      <Role>Fighter</Role>
    </Cid>
  </Character>
</data>

Collapsed Output:

JSON:

{
  "Character" : {
    "Name":"Cid",
    "Age":25,
    "Role":"Fighter"
  }
}

XML:

<data>
  <Character>
    <Age>25</Age>
    <Role>Fighter</Role>
  </Character>
</data>

Unwrapped Output:

JSON:

{
  "Name":"Cid",
  "Age":25,
  "Role":"Fighter"
}

XML:

<data>
  <Cid>
    <Age>25</Age>
    <Role>Fighter</Role>
  </Cid>
</data>