Simplify schema exporting

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Merge branch 'master' of github.com:phpmyadmin/phpmyadmin
Change confusing variable name

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

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Append page number to file name only if it is set

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Use page number in filename

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Properly mark saved status for new pages

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