add callstack to page info for query logging

[brosenberger]

following configuration is needed in order to activate this features within the app/etc/env.php:

'db' => [ 'connection' => [ 'default' => [ ... 'profiler' => [ 'enabled' => '1', 'class' => '\MSP\DevTools\Profiler\Db\Db_Profiler' ] ] ] ],

solves #38 not a pretty view within the chrome-toolbar, but at least the information where query is executed is present