Too wide padding on mobile screen
We are having too wide padding (on x-axis) on mobile screens.
Here is a screenshot on iPhone SE (320x568):
![docs-gitlab-com-20200715](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
Content has only 198px in width (= 62% of the screen width) while paddings including the left nav bar has 122px (= 38% of the screen width).