Text label for add new environment

[gabalafou]

Fixes #127.

Description

This pull request adds text "New" to the button for creating a new environment.

Pull request checklist

• [x] Did you test this change locally?
• [n/a] Did you update the documentation (if required)?
• [n/a] Did you add/update relevant tests for this change (if required)?

[gabalafou]

@peytondmurray looks like you have to approve it again for me to merge this