Core - Allow device providers to opt out of layout LED creation/removal

Device properties UI - Highlight selected LEDs in white

src/Artemis.Core/Plugins/DeviceProviders/DeviceProvider.cs

@@ -51,6 +51,18 @@ namespace Artemis.Core.DeviceProviders
         /// </summary>
         public bool CanDetectLogicalLayout { get; protected set; }
 
+        /// <summary>
+        ///     Gets or sets a boolean indicating whether adding missing LEDs defined in a layout but missing on the device is supported
+        ///     <para>Note: Defaults to <see langword="true" />.</para>
+        /// </summary>
+        public bool CreateMissingLedsSupported { get; protected set; } = true;
+
+        /// <summary>
+        ///     Gets or sets a boolean indicating whether removing excess LEDs present in the device but missing in the layout is supported
+        ///     <para>Note: Defaults to <see langword="true" />.</para>
+        /// </summary>
+        public bool RemoveExcessiveLedsSupported { get; protected set; } = true;
+
         /// <summary>
         ///     Loads a layout for the specified device and wraps it in an <see cref="ArtemisLayout" />
         /// </summary>