[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/environments/environment.test.ts

@@ -121,6 +121,9 @@ export const environment: BuildConfig = {
       // NOTE: every how many minutes submission is saved automatically
       timer: 5
     },
+    duplicateDetection: {
+      alwaysShowSection: false
+    },
     typeBind: {
       field: 'dc.type'
     },