Fix ordering for "+" button in blackboard (#197)

Author: PaulDemeulenaere

com.unity.visualeffectgraph/CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Prevent infinite compilation loop [Case 1298466](https://issuetracker.unity3d.com/product/unity/issues/guid/1298466/)
 - Remove some useless compilation triggers (modifying not connected or disabled nodes for instance)
 - Modified Sign operator node output for float when input is 0.0f [Case 1299922](https://fogbugz.unity3d.com/f/cases/1299922/)
+- Use alphabetical order in type list in blackboard "+" button [Case 1304109](https://issuetracker.unity3d.com/product/unity/issues/guid/1304109/)
 
 ## [10.3.1] - 2020-01-26
 

com.unity.visualeffectgraph/Editor/GraphView/Blackboard/VFXBlackboard.cs

@@ -402,6 +402,11 @@ void OnAddOutputParameter(object parameter)
             newParam.isOutput = true;
         }
 
+        private static IEnumerable<VFXModelDescriptor> GetSortedParameters()
+        {
+            return VFXLibrary.GetParameters().OrderBy(o => o.name);
+        }
+
         void OnAddItem(Blackboard bb)
         {
             GenericMenu menu = new GenericMenu();
@@ -412,7 +417,7 @@ void OnAddItem(Blackboard bb)
                 menu.AddSeparator(string.Empty);
             }
 
-            foreach (var parameter in VFXLibrary.GetParameters())
+            foreach (var parameter in GetSortedParameters())
             {
                 VFXParameter model = parameter.model as VFXParameter;
 
@@ -518,7 +523,7 @@ void OnAddOutputParameterMenu()
         {
             GenericMenu menu = new GenericMenu();
 
-            foreach (var parameter in VFXLibrary.GetParameters())
+            foreach (var parameter in GetSortedParameters())
             {
                 VFXParameter model = parameter.model as VFXParameter;