Merge pull request #339 from CTDisasterManagement/V8.2

Resolved Github Issue
center logo #344
Resolved GitHub and intenal QA team reported issues

Resolved GitHub issues: #315, #343.
Resolved Issues reported by internal QA team:
1) All the divs containing the error message had same id.
2)The next button to options tab in author mode remained disabled.
3)nls change for show/hide layer option.