IPFS interstitial page has white bottom border / CSS padding

[stephendonner]

Description

IPFS interstitial page has white bottom border / CSS padding

Steps to Reproduce

1. new profile, launch Brave
2. load ipns://brantly.eth
3. look at the interstitial page

Actual result:

Expected result:

Reproduces how often:

100%

Brave version (brave://version info)

Brave	1.26.24 Chromium: 91.0.4472.57 (Official Build) nightly (x86_64)
Revision	e3443317fa07f1e9997e4a9c738eddfefc3c0292-refs/branch-heads/4472_54@{#6}
OS	macOS Version 11.3.1 (Build 20E241)

Version/Channel Information:

• Can you reproduce this issue with the current release? no
• Can you reproduce this issue with the beta channel? no
• Can you reproduce this issue with the nightly channel? yes

@spylogsster @zenparsing not sure why this is still happening, given the fix for #15870 landed on nightly / 1.26.x?

[stephendonner]

Verified FIXED using

Brave	1.27.8 Chromium: 91.0.4472.70 (Official Build) nightly (x86_64)
Revision	fe095368270a32c92959403754bf6fd357dd9953-refs/branch-heads/4472@{#1172}
OS	macOS Version 11.3.1 (Build 20E241)

Tested on a couple window sizes

example	example