security bug fixes

Signed-off-by: Smita Kumari <kumarismita62@gmail.com>

Fix coding style

Signed-off-by: Smita Kumari <kumarismita62@gmail.com>

use existing escapeHtml function

Signed-off-by: Smita Kumari <kumarismita62@gmail.com>
Merge pull request #1220 from smita786/gsoc_central_columns_list

security bug fixes