Added HtmlSpecialCharsCodeHints as default extension
Convert language switch dialog to use a dropdown instead of a bulleted list
A few fixes after review
A bit cleanup
Workaround for a display bug
Included a few missing special chars
update to sprint 23
split out package validation so that it can be used on server.

The validation code is no longer in ExtensionManagerDomain itself.
refactor HTMLDocument to be only partially experimental
Move the strings prefs inside core
Merge pull request #3254 from adobe/jasonsanjose/sprint23

update to sprint 23
updated version number
eliminate errors that are unused in the ExtensionManagerDomain
Allows validation with required package.json.

For the extension registry, we want package.json to be required.
With this change, the validation code allows optional checking for package.json.
Merge pull request #3261 from adobe/dangoor/shared-extensibility

Breaks out package validation for sharing with brackets-registry
Merge pull request #3260 from TomMalbran/tom/fix-issue-2645

Fix #2645: [FRA, JPN]: The word "Loading..." is not localized.
Adressed issues after second review
Addressed issues after second review
Fixed two typos
Fixed an error while committing