OIS button isn't inline on Steam store pages

**Describe the bug**
On store pages the button is a single pixel too low.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to A Steam store page
1. Scroll down until the button is visible
1. Observe pixel misalignment. 

**Expected behavior**
Button should be inline. 

**Desktop (please complete the following information):**
 - OS: any
 - Browser Firefox
 - Version 87
