[TLC-674] Hide empty duplicate section UNLESS config overrides

A new config property allows the user to force the duplicate
section to be displayed even if there are no duplicates
as sometimes this is useful information to a reviewer or
submitter

src/config/default-app-config.ts

@@ -154,6 +154,9 @@ export class DefaultAppConfig implements AppConfig {
        */
       timer: 0
     },
+    duplicateDetection: {
+      alwaysShowSection: false
+    },
     typeBind: {
       field: 'dc.type'
     },