Merge remote-tracking branch 'origin/master' into 1.9

# Conflicts:
#	Flax.flaxproj

Source/Engine/Scripting/Attributes/CollectionAttribute.cs

@@ -46,6 +46,11 @@ namespace FlaxEngine
         /// </summary>
         public bool CanReorderItems = true;
 
+        /// <summary>
+        /// Gets or sets whether items can be added or removed from this collection.
+        /// </summary>
+        public bool CanResize = true;
+
         /// <summary>
         /// Gets or sets whether the items of this collection can be null. If <c>true</c>, applications using this collection should prevent user to add null items to the collection.
         /// </summary>

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

@@ -23,11 +23,14 @@ namespace FlaxEngine
         public int FontSize;
 
         /// <summary>
-        /// The custom header color (as 32-bit uint).
+        /// The custom header color (as 32-bit uint in RGB order, bottom bits contain Blue).
         /// </summary>
         public uint Color;
 
-        private HeaderAttribute()
+        /// <summary>
+        /// Initializes a new instance of the <see cref="HeaderAttribute"/> class.
+        /// </summary>
+        public HeaderAttribute()
         {
         }
 

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

@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace FlaxEngine;
 
@@ -15,7 +15,7 @@ public class WatermarkAttribute : Attribute
     public string WatermarkText;
 
     /// <summary>
-    /// The watermark color.
+    /// The watermark color (as 32-bit uint in RGB order, bottom bits contain Blue).
     /// </summary>
     public uint WatermarkColor;
 
@@ -26,7 +26,7 @@ public class WatermarkAttribute : Attribute
     public WatermarkAttribute(string text)
     {
         WatermarkText = text;
-        WatermarkColor = 0; // default color of watermark in textbox
+        WatermarkColor = 0; // Default color of watermark in textbox
     }
 
     /// <summary>