refactor PMA_mult_submits and Add UT
rename PMA_getQueryFromSelected function
Merge branch 'master' of https://github.com/phpmyadmin/phpmyadmin into mult_submit_refactor
add function PMA_getUrlParams and PMA_getQueryStrFromSelected
add UT for PMA_mult_submits
fix unset unset($submit_mult); and remove unneeded space
Merge pull request #603 from xmujay/mult_submit_refactor

refactor PMA_mult_submits and Add UT