Fix new intent having default input/output

[jeffladiray]

Description

Fix new intent having default input/output.
Now only the first intent will have content, all the other one should be empty

Fixes #34

Type of change

• Other (non-breaking change which doesn't match an issue, Non-code related, ...)

How Has This Been Tested?

Test Configuration:

• Yarn/npm/nodejs version: v1.13.0/v6.5.0/v11.9.0
• OS version: macOS 10.14.3
• Chrome version: Google Chrome 72.0.3626.119

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works