Fixed Performance issue in GameplayIngredientsSettings when having a big list of Excluded managers

CHANGELOG.md

 #### Fixed
 
 * Fixed LinkGameView not working in play mode when excluding VirtualCameraManager.
+* Fixed Performance issue in GameplayIngredientsSettings when having a big list of Excluded managers.
 
 ## 2019.1.2
 

Editor/PropertyDrawers/TypeDropDownPropertyDrawer.cs

     {
         Dictionary<string, List<string>> m_AssignableTypeNames;
 
+        Type type;
+
+        
+
-            Type type = ((TypeDropDownAttribute)attribute).m_BaseType;
+            if(type == null)
+                type = ((TypeDropDownAttribute)attribute).m_BaseType;
+
-             
+            
+            EditorGUI.BeginChangeCheck();
-            if(GUI.changed && index != newVal)
+            if(EditorGUI.EndChangeCheck() && index != newVal)
             {
                 property.stringValue = m_AssignableTypeNames[TypeName][newVal];
             }
         {
             if (m_AssignableTypeNames == null)
+            {
-            string key = baseType.FullName;
+                string key = baseType.FullName;
-            if (!m_AssignableTypeNames.ContainsKey(key))
-                m_AssignableTypeNames.Add(key, new List<string>());
+                if (!m_AssignableTypeNames.ContainsKey(key))
+                    m_AssignableTypeNames.Add(key, new List<string>());
-            foreach(var assembly in AppDomain.CurrentDomain.GetAssemblies())
-            {
-                foreach(var type in assembly.GetTypes())
+                foreach(var assembly in AppDomain.CurrentDomain.GetAssemblies())
-                    if(baseType.IsAssignableFrom(type) && !type.IsAbstract)
+                    foreach(var type in assembly.GetTypes())
-                        m_AssignableTypeNames[key].Add(type.Name);
+                        if(baseType.IsAssignableFrom(type) && !type.IsAbstract)
+                        {
+                            m_AssignableTypeNames[key].Add(type.Name);
+                        }
                     }
                 }
             }

Runtime/Settings/GameplayIngredientsSettings.cs

         [BoxGroup("Callables")]
         [SerializeField, InfoBox("Verbose Calls enable logging at runtime, this can lead to performance drop, use only when debugging.", InfoBoxType.Warning, "m_VerboseCalls")]
         private bool m_VerboseCalls = false;
+
+        [BoxGroup("Callables")]
         [SerializeField, InfoBox("Per-update calls should be avoided due to high performance impact. Enable and use with care, only if strictly necessary.", InfoBoxType.Warning, "m_AllowUpdateCalls")]
         private bool m_AllowUpdateCalls = false;