Bug #4458: Preview doesn't work when adding a new column.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Fix coding style

Signed-off-by: Marc Delisle <marc@infomarc.info>
Merge branch 'master' of https://github.com/phpmyadmin/phpmyadmin
Clarify parameter type

Signed-off-by: Marc Delisle <marc@infomarc.info>
Merge pull request #1234 from ashutoshdhundhara/bug_4458

Bug #4458: Preview doesn't work when adding a new column.
rfe-755: export with table/column name changes

Signed-off-by: Chirayu Chiripal <chirayu.chiripal@gmail.com>