(svn r18515) -Change: make it visible when you're to pass the next signal on danger and possible to cancel it

-Fix [FS#2891]: when you pass a signal at danger, in a PBS controlled area, don't try to do the 'safe' thing and stop, but continue going; the user wanted the train to pass the signal at danger so (s)he has to suffer the consequences. Ofcourse one can always stop the train manually.

src/vehicle_gui.cpp

@@ -1959,6 +1959,7 @@ public:
 		this->SetWidgetDisabledState(VVW_WIDGET_CLONE_VEH, !is_localcompany);
 
 		if (v->type == VEH_TRAIN) {
+			this->SetWidgetLoweredState(VVW_WIDGET_FORCE_PROCEED, Train::From(v)->force_proceed == 2);
 			this->SetWidgetDisabledState(VVW_WIDGET_FORCE_PROCEED, !is_localcompany);
 			this->SetWidgetDisabledState(VVW_WIDGET_TURN_AROUND, !is_localcompany);
 		}