Description of problem:
When I click the forget the button on Network settings It's crashed and still connected but I have to 2-3 times to forget network If I want to also see crashed all the times. 

Thank you

Version-Release number of selected component:
control-center-3.10.0-1.fc20

Additional info:
reporter:       libreport-2.1.7
backtrace_rating: 4
cmdline:        gnome-control-center --overview
crash_function: g_type_check_instance_cast
executable:     /usr/bin/gnome-control-center
kernel:         3.11.3-301.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000
var_log_messages: Oct  7 07:53:15 localhost abrt[24750]: Saved core dump of pid 24711 (/usr/bin/gnome-control-center) to /var/tmp/abrt/ccpp-2013-10-07-07:53:14-24711 (118300672 bytes)

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 g_type_check_instance_cast at gtype.c:4008
 #1 show_details_for_row at net-device-wifi.c:1678
 #2 _g_closure_invoke_va at gclosure.c:840
 #5 gtk_real_button_released at gtkbutton.c:2101
 #10 gtk_button_button_release at gtkbutton.c:1933
 #11 _gtk_marshal_BOOLEAN__BOXEDv at gtkmarshalers.c:130
 #12 _g_closure_invoke_va at gclosure.c:840
 #15 gtk_widget_event_internal at gtkwidget.c:7154
 #16 gtk_widget_event at gtkwidget.c:6816
 #17 propagate_event_up at gtkmain.c:2393