Form hint is cut off

[github-throwaway]

What

The hint for the field weight/quantity is too long and get cut off. Either make it shorter or add line break.

Expected behavior

See hint in full.

Part of

• 🎯 What can I work on ? #525

Screenshot/Mockup/Before-After

<!— (optional, delete if empty) —>

[g123k]

Hello,

We know about this "issue," but we won't fix it by changing the hint because it may be OK in English but not in other languages.
Instead, we will add the "Help" icon (cf #6214)