UI: Fix disabled auto-start/stop checkboxes

The YouTube integration auto-start and auto-stop checkboxes are only
made visible when scheduling an event. However, they are disabled by
default so users can't change them when they're visible.

I suspect these checkboxes used to always be visible and were on an
enable/disable flip which got changed to a visibility flip.

UI/window-youtube-actions.cpp

@@ -35,9 +35,6 @@ OBSYoutubeActions::OBSYoutubeActions(QWidget *parent, Auth *auth)
 	ui->latencyBox->addItem(QTStr("YouTube.Actions.Latency.UltraLow"),
 				"ultraLow");
 
-	ui->checkAutoStart->setEnabled(false);
-	ui->checkAutoStop->setEnabled(false);
-
 	UpdateOkButtonStatus();
 
 	connect(ui->title, &QLineEdit::textChanged, this,