Sign in page description font style in lists (<ol>, <ul>) is not the same as in paragraphs (<p>)
### Summary
When entering a custom sign in description text at `/admin/appearance`, one can use markdown. When adding lists, the resulting font color and size inside lists is different from the paragraphs. I'd think that the font color and size should be the same to better integrate the lists.
Using omnibus GitLab CE 10.3.3.
### Example screenshot
### Steps to reproduce
Go to `/admin/appearance`, enter a custom sign up description with lists, eg:
```markdown
### This is a heading
Some paragraph text Some paragraph text Some paragraph text
1. First list item
2. Second list item
3. Third list item
```
Visit `/users/sign_in`: The list items have different font styling than the paragraph.
issue