Variable max brightness as some mice do not use 0-100 but 0-4 as brightness values.

app/AsusMouseSettings.cs

@@ -473,6 +473,8 @@ namespace GHelper
 
             if (mouse.HasRGB())
             {
+                sliderBrightness.Max = mouse.MaxBrightness();
+
                 foreach (LightingMode lm in Enum.GetValues(typeof(LightingMode)))
                 {
                     if (mouse.IsLightingModeSupported(lm))

app/Peripherals/Mouse/AsusMouse.cs

@@ -936,6 +936,11 @@ namespace GHelper.Peripherals.Mouse
             return false;
         }
 
+        public virtual int MaxBrightness()
+        {
+            return 100;
+        }
+
         //Override to remap lighting mode IDs.
         //From OpenRGB code it looks like some mice have different orders of the modes or do not support some modes at all.
         protected virtual byte IndexForLightingMode(LightingMode lightingMode)