Fix CSV exporting by correctly setting the filename when exporting to multiple files.
Fix CSV exporting by correctly setting the filename when exporting to multiple files.

CoolSwitcher/sequelpro,treejames/sequelpro,eric-seekas/sequelpro,eric-seekas/sequelpro,Jellyfrog/sequelpro,josegonzalez/sequelpro,kaneshin/sequelpro,chenbk85/sequelpro,eric-seekas/sequelpro,eric-seekas/sequelpro,leichunxin/sequelpro,josegonzalez/sequelpro,abhibeckert/sequelpro,treejames/sequelpro,dnl-jst/sequelpro,dnl-jst/sequelpro,Jellyfrog/sequelpro,leichunxin/sequelpro,abhibeckert/sequelpro,abhibeckert/sequelpro,treejames/sequelpro,leichunxin/sequelpro,chenbk85/sequelpro,josegonzalez/sequelpro,kaneshin/sequelpro,CoolSwitcher/sequelpro,dnl-jst/sequelpro,treejames/sequelpro,Jellyfrog/sequelpro,abhibeckert/sequelpro,chenbk85/sequelpro,kaneshin/sequelpro,kaneshin/sequelpro,chenbk85/sequelpro,josegonzalez/sequelpro,leichunxin/sequelpro,CoolSwitcher/sequelpro,Jellyfrog/sequelpro,dnl-jst/sequelpro,CoolSwitcher/sequelpro