[JENKINS-69549] Margins for headers and paragraphs make descriptions … (#7078)

Co-authored-by: Alexander Brandes <mc.cache@web.de>
Co-authored-by: Tim Jacomb <timjacomb1@gmail.com>
Co-authored-by: Tim Jacomb <21194782+timja@users.noreply.github.com>

core/src/main/java/jenkins/telemetry/Telemetry.java

@@ -130,6 +130,11 @@ public abstract class Telemetry implements ExtensionPoint {
         return ExtensionList.lookup(Telemetry.class);
     }
 
+    @Restricted(NoExternalUse.class) // called by jelly
+    public static boolean isAnyTrialActive() {
+        return all().stream().anyMatch(Telemetry::isActivePeriod);
+    }
+
     /**
      * @since 2.147
      * @return whether to collect telemetry