Make BlockColor.Index a property and other fixes

GamecraftModdingAPI/Blocks/BlockColor.cs

@@ -7,7 +7,10 @@ namespace GamecraftModdingAPI.Blocks
     {
         public BlockColors Color;
         public byte Darkness;
-        public byte Index;
+
+        public byte Index => Color == BlockColors.Default
+            ? byte.MaxValue
+            : (byte) (Darkness * 10 + Color);
 
         public BlockColor(byte index)
         {
@@ -23,8 +26,6 @@ namespace GamecraftModdingAPI.Blocks
                 Color = (BlockColors) (index % 10);
                 Darkness = (byte) (index / 10);
             }
-
-            Index = index;
         }
 
         public BlockColor(BlockColors color, byte darkness)
@@ -33,8 +34,6 @@ namespace GamecraftModdingAPI.Blocks
                 throw new ArgumentOutOfRangeException(nameof(darkness), "Darkness must be 0-9 where 0 is default.");
             Color = color;
             Darkness = darkness;
-            if (color == BlockColors.Default) Index = byte.MaxValue;
-            else Index = (byte) (darkness * 10 + color);
         }
 
         public float4 RGBA => Block.BlockEngine.ConvertBlockColor(Index);

GamecraftModdingAPI/Blocks/TextBlock.cs

@@ -31,9 +31,9 @@ namespace GamecraftModdingAPI.Blocks
 
 	        set
 	        {
+		        if (value == null) value = "";
 		        BlockEngine.SetBlockInfo(this, (ref TextBlockDataStruct tbds, string val) =>
 		        {
-			        if (val == null) val = "";
 			        tbds.textCurrent.Set(val);
 			        tbds.textStored.Set(val);
 		        }, value);
@@ -51,6 +51,7 @@ namespace GamecraftModdingAPI.Blocks
 
 	        set
 	        {
+		        if (value == null) value = "";
 		        BlockEngine.SetBlockInfo(this, (ref TextBlockDataStruct tbds, string val) =>
 			        tbds.textBlockID.Set(val), value);
 		        BlockEngine.SetBlockInfo(this,