Description and Extra Info blocks are not clearly separated

**Before we start...:**

- [x] I checked the documentation and found no answer
- [x] I checked to make sure that this issue has not already been filed
- [x] I'm reporting the issue to the correct repository (for multi-repository projects)

**Branch/Commit:**

Main branch

**Expected behavior:**

There should be a clear distinction between the story's description and the extra info when displaying a story. Both in the `show` action and in the `estimate` action.

**Actual behavior:**

It's not clear when one ends and the other starts:

**Steps to reproduce:**

1. Step 1: Create a story with description and extra info
2. Step 2: Go to the show page

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