adds api support for enabling/disabling controls and rules

src/project.c

@@ -1232,6 +1232,7 @@ int setcontrol(EN_Project p, int type, int linkIndex, double setting,
     control->Setting = s;
     control->Time = t;
     control->Grade = lvl;
+    control->isEnabled = ENABLED;
     return 0;
 }