Description:

It is impossible to create a channel with a name in Russian in the desktop clients and in the web browsers.

Steps to reproduce:

1. Go to "Create a New Channel"
2. In the "Channel Name" field I enter a name in Russian "Тест" or "Тестовый канал"
3. After pressing the "Create" button nothing happens

Server Setup Information:

• Version of Rocket.Chat Server: 0.73.2
• Operating System: Ubuntu Linux 16.04.3
• Deployment Method: snap
• Number of Running Instances: 1
• NodeJS Version: v8.11.3

In the server settings:

UTF8 Names Validation - "[0-9а-яА-Яa-zA-Z-_. ]+"
UTF8 Names Slugify - " True"
Allow Special Characters in Room Names -"True"