Allow changing RGBAColorWidgetSetting with arrow keys

src/main/java/de/shiewk/widgets/widgets/settings/RGBAColorWidgetSetting.java

@@ -12,6 +12,7 @@ import net.minecraft.client.gui.cursor.StandardCursors;
 import net.minecraft.client.gui.screen.Screen;
 import net.minecraft.client.gui.screen.narration.NarrationMessageBuilder;
 import net.minecraft.client.gui.widget.ClickableWidget;
+import net.minecraft.client.input.KeyInput;
 import net.minecraft.sound.SoundEvents;
 import net.minecraft.text.Text;
 import net.minecraft.util.math.MathHelper;
@@ -305,6 +306,19 @@ public class RGBAColorWidgetSetting extends WidgetSettingOption {
                 };
             }
 
+            @Override
+            public boolean keyPressed(KeyInput input) {
+                if (input.isUp()) {
+                    setValue(getValue() + 1);
+                    return true;
+                } else if (input.isDown()) {
+                    setValue(getValue() - 1);
+                    return true;
+                } else {
+                    return super.keyPressed(input);
+                }
+            }
+
             private int bottomColor() {
                 return RGBAColorWidgetSetting.this.getColor() & ~componentMask();
             }