Horizontal line content styles look vintage

[oleq]

📝 Provide a description of the improvement

ATM

What it could look like

It helps especially when the fake caret around widgets (#6693) is displayed because:

• the margin is bigger so there's more place to display the fake caret
• the HR does not look like a fake caret

---

If you'd like to see this improvement implemented, add a 👍 reaction to this post.