The most recent reply is here:
Which only states that this is not an available option. As CS doesn’t forward nor handle suggestions you can do so however through the ingame menu.
- Using the in-game “Submit Feedback” option that is found on the Help menu.
- Press the Esc key to open the Game Menu, and click Support.
- Click Submit feedback or bug report.
- Click Submit a suggestion.
- Follow the guidelines on the submission form, and enter your suggestion.
- Click Submit.