auto disable in UI

src/main/java/stirling/software/SPDF/config/AppConfig.java

@@ -41,6 +41,11 @@ public class AppConfig {
         return (defaultNavBar != null) ? defaultNavBar : "Stirling PDF";
     }
 	
+    @Bean(name = "enableAlphaFunctionality")
+    public boolean enableAlphaFunctionality() { 
+        return applicationProperties.getSystem().getEnableAlphaFunctionality() != null ? applicationProperties.getSystem().getEnableAlphaFunctionality() : false;
+    }
+    
 	@Bean(name = "rateLimit")
     public boolean rateLimit() {
         String appName = System.getProperty("rateLimit");