use padding to prevent vert scrollbar from causing horz scrollbar
Tweak 'Getting Started' content:
- It's no longer THAT early of a build
- Mention other Quick Edit modes
- Make Live Preview caveats match the in-product message more closely
Merge pull request #2719 from adobe/pflynn/update-getting-started

Tweak 'Getting Started' content
Merge pull request #2714 from adobe/randy/issue-2532

Prevent horizontal scrollbars in code hints
Merge remote-tracking branch 'upstream/master' into openline
Add unit tests for Open Line feature