bug #4208 Can't browse tables after sorting on columns with fieldnames that have a '-'

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Merge branch 'QA_4_1' of github.com:phpmyadmin/phpmyadmin into QA_4_1

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>