In Web IDE, committing by pressing the Enter key, erases the commit message

Summary

Steps to reproduce

1. Open the Web IDE
2. Make some changes
3. Go to Commit tab
4. Fill the Commit Message
5. Check Create a new branch
6. Type a branch name
7. While leaving the focus on the branch input, press Enter key
8. The Commit Message is removed

What is the current bug behavior?

The Commit Message is removed.

What is the expected correct behavior?

The commit should be submitted.

Relevant logs and/or screenshots

No console logs available

Output of checks

This bug happens on GitLab.com

Possible fixes

app/assets/javascripts/ide/components/commit_sidebar/form.vue#L183-19

Changes the type of the *Commit" button to "submit", to avoid the default action on the Discard draft.