[bug 938660] Update CTA for Hungary Fx OS page launch 2
Fix aria-labelledby bug on SOM 2012. Bug 941663.

- Also fix modal headline hide when in mobile view.
Update careers-teaser.html

Replace all double hyphens with -~ or ~- in careers teaser to ensure valid HTML5 comment. Bug 941872.
Merge pull request #1430 from fwenzel/careers-teaser

Update careers-teaser.html
Merge pull request #1432 from alexgibson/bug-938660-update-cta-hungary-launch-2

[bug 938660] Update CTA for Hungary Fx OS page launch 2
Merge pull request #1427 from jpetto/bug-941663-aria-labelledby-modal

Fix aria-labelledby bug on SOM 2012. Bug 941663.
Remove spurious newlines caused by per-file license block. Bug 942237.
Merge pull request #1433 from fwenzel/nonewlines

Remove spurious newlines caused by per-file license block. Bug 942237.
Bug 900426 - tabzilla.js: 200 instead of 304