FIJISettingsViewer: bind ESC to cancel button in net selection dialogs

bin/Tk/FIJISettingsViewer.pm

@@ -1592,6 +1592,7 @@ sub _select_net_dialog {
         -buttons => [qw/~OK ~Cancel/],
     );
     $select_net_dialog->bind('<Return>', => sub {});
+    $select_net_dialog->bind('<Escape>' => [$select_net_dialog->Subwidget("B_Cancel"), 'Invoke']);
 
     my $sel  = $select_net_dialog->FIJINetSelection(-nets =>$self->{'nets'}, -selected_nets_listref=>$netname_listref, -select_multiple=>$select_multiple);
     $sel->pack(-expand=>1,-fill=>'both',-padx=>5,-pady=>5);