Ad-Removal Should Collapse/Remove Ad-Containers on YouTube

[jonathansampson]

Description

Ad-containers often exist after ad-removal, and may take up a large amount of screen-space.

Steps to Reproduce

1. Go to youtube.com

Actual result:
Large empty region at the top of the page.

Expected result:
No empty region should remain after ad-removal.

Reproduces how often:
100%

Brave Version

0.19.139

about:brave info:

Brave: 0.19.139 
rev: 99aa17da28e040543b4ba217d2c4dd6633bf1446 
Muon: 4.7.2 
libchromiumcontent: 64.0.3282.85 
V8: 6.4.388.20 
Node.js: 7.9.0 
Update Channel: Release 
OS Platform: Microsoft Windows 
OS Release: 10.0.16299 
OS Architecture: x64

Reproducible on current live release:
Yes.

Additional Information

[btlechowski]

Verified on Ubuntu 17.10 x64

• 0.23.8 06c657b
• Muon 6.1.5
• libchromiumcontent 66.0.3359.181

Verified on Windows 10 x64

• 0.23.8 06c657b
• Muon 6.1.5
• libchromiumcontent 66.0.3359.181

Verified on MacOS 10.13.4 x64 using the following build:

• 0.23.11 6565c06
• muon: 7.1.0
• libchromiumcontent: 67.0.3396.87