Linting: Use jQuery Style Guide JSHint settings

- Tabs to spaces in i18n
i18n: Fix linting and dictionary escaping

- Remove jQuery Validation concating till the form validation
integration is finalized
- Escape/Unescape the quote characters to match the new double quoting
Merge pull request #3092 from nschonni/v4-jquery-styleguide-jshint

V4 jquery styleguide jshint