feat: enable scrolling when added large image

[Ir1d]

• Motivation for features / changes

In my case the image is too big I suppose it's 1920x640.

After clicking:

• Technical description of changes

I let it scroll.

• Screenshots of UI changes

But it's not that visually pleasing totally.

• Detailed steps to verify changes work correctly (as executed by you)

• Alternate designs / implementations considered

I'm not sure how to make it more beautiful, but the current fix works perfectly for me. Hope it helps.

[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here (e.g. I signed it!) and we'll verify it.

---

What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
• The email used to register you as an authorized contributor must be the email used for the Git commit. Check your existing CLA data and verify that your email is set on your git commits.
• The email used to register you as an authorized contributor must also be attached to your GitHub account.

ℹ️ Googlers: Go here for more info.

[Ir1d]

I signed it!

[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.

[stephanwlee]

Thanks for the PR!

[Ir1d]

btw, do you think it should be overflow: auto; instead of x/y ?

[stephanwlee]

Actually, thanks for pointing it out, this should be overflow-x. In y-axis, the page grows infinitely so there should be no scrollbar. If I am understanding your screenshots correctly, you probably had overflow-x.