Bug: .glightbox-open hides element overflowing edge of body container

[Stephen-X]

Describe the bug
A clear and concise description of what the bug is.

The .glightbox-open class, which is used to prevent scrolling when glightbox is opened:

glightbox/src/postcss/glightbox.css

Line 406 in e52876c

overflow: hidden;

is currently being added to both the HTML element and the body element:

glightbox/src/js/glightbox.js

Line 200 in e52876c

_.addClass(body, 'glightbox-open');

And it hides all elements in body that overflow their container, causing "background flashes" as elements disappear then reappear when opening and closing GLightbox.

Could we either remove the class from the body element (adding it to html should do the trick?), or switch to overflow: clip instead?

Are you able to reproduce the bug in the demo site
Yes|No.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Post the code you are using
Help me solve issues faster, if I can copy paste your code I can try to reproduce and fix the bug faster.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop:

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone:

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.