Don't execute menu commands if we're at a breakpoint.
Add HTML highlighting unit tests
Corrected some mistakes in Polish translation

Typos, commas, unclear sentences.
Corrected some mistakes in Polish translation

Typos, elipsis as \u2026
Merge pull request #3361 from niutech/master

Corrected some mistakes in Polish translation
Merge pull request #3360 from niutech/patch-1

Corrected some mistakes in Polish translation
Making changes for Jason's review comments.
Merge pull request #3356 from adobe/rlim/html-highlight-test

Add HTML highlighting unit tests
Merge pull request #3347 from adobe/glenn/issue-3108

Don't execute menu commands if we're at a breakpoint
Fix running dev & user extension unit tests. After pull #3334 only core
(extensions/default) extensions show up in the spec running UI.
Merge pull request #3364 from adobe/pflynn/fix-dev-extension-tests

Fix running dev & user extension unit tests