Wrong HTML markup in errors messages of user creation

[tassoevan]

Description:

Toasts for errors messages in Administration > Users > Add User have HTML escaped code instead of expected style.

Steps to reproduce:

1. As admin user, go to Administration > Users > Add User;
2. Fill the form using a already-used email address.
3. Click Save.

Expected behavior:

Show a toast error message containing the text

[email protected] is already in use

Actual behavior:

A toast error message is displayed with the text

<strong>[email protected]</strong> is already in use :(

Server Setup Information:

• Version of Rocket.Chat Server: 0.67.0-develop
• Operating System: linux (Ubuntu 16.04 Xenial Xerus)
• Deployment Method: source code
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: 8.11.3
• MongoDB Version: 3.2

Additional context