Have single-sort url besides multi-sort for each column and make single-sort default on click

Signed-off-by: Atul Pratap Singh <atulpratapsingh05@gmail.com>
update js for add/remove modify columns in multi sort

Signed-off-by: Atul Pratap Singh <atulpratapsingh05@gmail.com>
Merge branch 'QA_4_2' of github.com:phpmyadmin/phpmyadmin into QA_4_2