UIDefaultsLoader: changed .properties file loading order: now all core .properties files are loaded before loading addon .properties files, which makes it easier to overwrite core values in addons; also, addon loading order can be specified

flatlaf-swingx/src/main/java/com/formdev/flatlaf/swingx/FlatSwingXDefaultsAddon.java

@@ -29,4 +29,8 @@ import com.formdev.flatlaf.FlatDefaultsAddon;
 public class FlatSwingXDefaultsAddon
 	extends FlatDefaultsAddon
 {
+	@Override
+	public int getPriority() {
+		return 10;
+	}
 }