Fix for Issue#656.  The setExtensionHidden: method should not be called and setCanSelectedHiddenExtension:should be set to YES.
Fix for Issue#656.  The setExtensionHidden: method should not be called and setCanSelectedHiddenExtension:should be set to YES.

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