Resolved issues reported by internal QA team

Resolved the following issues:
1) The dom nodes for all the error messages were getting the same id in
user mode.
2) Next button in "style" tab gets disabled on deselecting layer and
hence the options tab remained inaccessible from style tab.
3) Changed the text from show/hide layer to show layer in options tab.
Merge pull request #348 from CTDisasterManagement/V8.6

Resolved issues reported by internal QA team