Data bindings - Fix crash when removing color gradient stops

src/Artemis.Core/Models/Profile/DataBindings/DataBindingRegistration.cs

@@ -64,5 +64,15 @@ namespace Artemis.Core
             DataBinding = new DataBinding<TLayerProperty, TProperty>(LayerProperty, dataBinding);
             return DataBinding;
         }
+
+        /// <inheritdoc />
+        public void ClearDataBinding()
+        {
+            if (DataBinding == null)
+                return;
+
+            // The related entity is left behind, just in case the data binding is added back later
+            LayerProperty.DisableDataBinding(DataBinding);
+        }
     }
 }

src/Artemis.Core/Models/Profile/DataBindings/IDataBindingRegistration.cs

@@ -20,5 +20,10 @@
         /// </summary>
         /// <returns></returns>
         IDataBinding? CreateDataBinding();
+
+        /// <summary>
+        ///     If present, removes the current data binding
+        /// </summary>
+        void ClearDataBinding();
     }
 }