Force CommandLabelStyle text to black

Fix #801

Assets/Fungus/Scripts/Editor/CommandListAdaptor.cs

@@ -26,6 +26,7 @@ namespace Fungus.EditorUtils
             {
                 commandLabelStyle = new GUIStyle(GUI.skin.box);
                 commandLabelStyle.normal.background = FungusEditorResources.CommandBackground;
+                commandLabelStyle.normal.textColor = Color.black;
                 int borderSize = 5;
                 commandLabelStyle.border.top = borderSize;
                 commandLabelStyle.border.bottom = borderSize;