Refactors shared/pattern.js into core/ and display/
[CRX] Support <embed type="application/pdf">
Fixes smask backdrop
Removes button outline as visible in Chrome
Merge pull request #4203 from timvandermeij/outline-chrome

Removes button outline as visible in Chrome
Merge pull request #4194 from Rob--W/crx-pdf-embed

Support <embed type="application/pdf"> in Chromium extension
Merge pull request #4201 from yurydelendik/smask-backdrop

Fixes smask backdrop
Merge pull request #4189 from yurydelendik/split-pattern

Refactors shared/pattern.js into core/ and display/