Revert "Workaround for the Tern crash."

This reverts commit 22fed2a8e230f07394b3b1b5dfb8691dd214d76f.
Merge pull request #4565 from adobe/revert-acorn-fix

Revert "Workaround for the Tern crash."
Work around #4554 (Extension Manager font is hard to read on Windows), which
is a Chromium bug, by avoiding the lightest font-weight on Win. Lighten the
text slightly so it's still a little muted, like the design looks on Mac
and with older CEFs on Win.
Merge pull request #4566 from adobe/pflynn/windows-font-weight

Work around #4554 (Extension Manager font hard to read on Windows)
Update README.md
cleanup unit test prefs

force reset of unit test preferences

reuse test window for DocumentCommandHandlers-test

separate in and out of project save as tests

add jasmine global

match NodeConnection timeout for unit tests

free test window variables before closing the test window

code review comments

code review comments

jsdoc cleanup
Merge pull request #4563 from adobe/jasonsanjose/clean-unit-test-prefs

Unit test preference cleanup, reuse test window for DocumentCommandHandlers-test