Optimize FormItSaveForm export function

[joeke]

For big collections the FormItSaveForm can become a bit slow. I suggest the following optimisations for the export.class.php file:

• process() function: $data variable; extend the core getData() function and use $this->modx->query($c->toSql()) instead of getCollection().
• createCsv function: remove the checkListPermission from the foreach (line 72).
• createCsv function: line 95; remove $this->modx->getOption('manager_date_format') from the foreach, put in variable outside of foreach.

[Jako]

$modx->getCollection is the problem. Better switch to $modx->getIterator and write the output line by line.

[joeke]

Fixed with https://github.com/Sterc/FormIt/commit/5d76390a29544b80837d42f624e4df50b69d8090 and https://github.com/Sterc/FormIt/commit/bde24e2f9a2fb0e6823a61dcc4557e13f1e3c62a