Remove indentation setting from CSSCodeHints/unittests.js

This is a likely fix for #2612. I was unable to reproduce
that issue, but it is true that this code was no longer needed.
Remove redundant about menu item on the mac.
fixes #2606: live highlighting unit test failure

This fix ensures that Live Highlighting is turned on at the beginning
of the test so that the toggling done by the test works properly.
Updated the test per gruehle's feedback. The test does not work presently,
though.
Merge branch 'master' into dangoor/2606-live-highlight-failure
fixes #2606 by performing tests in order depending on the state
of the Live Highlighting menu item.
Always show about menu item when running in browser.
Merge pull request #2708 from adobe/dangoor/2606-live-highlight-failure

fixes #2606: live highlighting unit test failure
Merge pull request #2703 from adobe/dangoor/2612-indent-size

Remove indentation setting from CSSCodeHints/unittests.js
Merge pull request #2707 from adobe/glenn/issue-2618

Remove redundant about menu item on the mac