Fixed a ton of typos

Source/Engine/Scripting/Attributes/Editor/EditorOrderAttribute.cs

@@ -27,7 +27,7 @@ namespace FlaxEngine
         /// <remarks>
         /// Current order is resolved runtime, and can change if custom editor class has changed.
         /// </remarks>
-        /// <param name="order">The order order.</param>
+        /// <param name="order">The order.</param>
         public EditorOrderAttribute(int order)
         {
             Order = order;

Source/Engine/Scripting/Attributes/SerializeAttribute.cs

@@ -5,7 +5,7 @@ using System;
 namespace FlaxEngine
 {
     /// <summary>
-    /// Indicates that a field or a property of a serializable class should be be serialized. This class cannot be inherited.
+    /// Indicates that a field or a property of a serializable class should be serialized. This class cannot be inherited.
     /// </summary>
     [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
     public sealed class SerializeAttribute : Attribute