Hide welcome box aligned too close to entry content.

[hilayt24]

On the documentation contribution page (​https://make.wordpress.org/docs/) on the 480px screen the "hide welcome box" will appear too close to the entry content below.

Steps to reproduce :

1. Go to the ​https://make.wordpress.org/docs/ link
2. Inspect the site and change the screen width to 480px.
3. You will notice that the "hide welcome box" button will appear too close to the text.

[hilayt24]

Here is the issue

[smit08]

I have attached media screen code for 480px to solve this issue.

[hilayt24]

Duplicate of #6153.