Adding a condition on shape generators to check rather the PB Editor is open

Author: lopezt-unity

Editor/MenuActions/Editors/NewBezierShape.cs

@@ -26,7 +26,7 @@ public override bool hidden
 
         public override bool enabled
         {
-            get { return true; }
+            get { return Experimental.experimentalFeaturesEnabled && ProBuilderEditor.instance != null; }
         }
 
         protected override ActionResult PerformActionImplementation()

Editor/MenuActions/Editors/NewPolyShapeToggle.cs

@@ -34,7 +34,7 @@ public override bool hidden
 
         public override bool enabled
         {
-            get { return true; }
+            get { return ProBuilderEditor.instance != null; }
         }
 
         static bool CanCreateNewPolyShape()

Editor/MenuActions/Editors/NewShapeToggle.cs

@@ -18,7 +18,6 @@ sealed class NewShapeToggle : MenuToolToggle
         public override TooltipContent tooltip { get { return s_Tooltip; } }
         public override string menuTitle { get { return "New Shape"; } }
         public override int toolbarPriority { get { return 0; } }
-        protected override bool hasFileMenuEntry { get { return true; } }
 
         static readonly TooltipContent s_Tooltip = new TooltipContent
             (
@@ -27,8 +26,9 @@ sealed class NewShapeToggle : MenuToolToggle
                 keyCommandSuper, keyCommandShift, 'K'
             );
 
-        public override bool enabled {
-            get { return true; }
+        public override bool enabled
+        {
+            get { return ProBuilderEditor.instance != null; }
         }
 
         protected override ActionResult PerformActionImplementation()