Custom field shows node name instead of label title

Description:

If I create a custom field in "accounts" I see the node name in the input form, instead of the label title.

Steps to reproduce:

1. Go to accounts and enter in "Custom Fields to Show in User Info" this values:
   [{"Team":"Team"},{"Job Titel":"JobDescription"}]
2. Scroll down to Registration and enter this into the the custom fields textarea:

{
  "Team": {
    "type": "text",
    "required": false,
    "minLength": 2,
    "public": true
  },
  "JobDescription": {
    "type": "text",
    "required": false,
    "minLength": 2,
    "public": true
  }
}

3. Then the account input looks like this:

And the output like this:

Expected behavior:

The input field "JobDescrition" should habe a label with the title "Job Titel".

Server Setup Information:

• Version of Rocket.Chat Server: V4.5.2 & V4.6.1

Start in the Accounts settings and Registration custom-fields flow described in the reproduction steps, then reproduce the account input with the Team and JobDescription fields. Trace how the configured node names are mapped to displayed labels; done means the JobDescription input and resulting account view show the title “Job Titel” while the field key remains JobDescription.