simplify displaying the executors as follow-up to comment by @jglick to #1596

core/src/main/java/hudson/model/Computer.java

@@ -62,6 +62,7 @@ import hudson.util.RunList;
 import hudson.util.Futures;
 import hudson.util.NamingThreadFactory;
 import jenkins.model.Jenkins;
+import jenkins.model.queue.AsynchronousExecution;
 import jenkins.util.ContextResettingExecutorService;
 import jenkins.security.MasterToSlaveCallable;
 import org.kohsuke.accmod.Restricted;
@@ -898,12 +899,18 @@ public /*transient*/ abstract class Computer extends Actionable implements Acces
         List<DisplayExecutor> result = new ArrayList<DisplayExecutor>(executors.size()+oneOffExecutors.size());
         int index = 0;
         for (Executor e: executors) {
-            result.add(new DisplayExecutor(Integer.toString(index+1), String.format("executors/%d", index), e));
+            final AsynchronousExecution ae = e.getAsynchronousExecution();
+            if (ae == null || ae.displayCell()) {
+                result.add(new DisplayExecutor(Integer.toString(index + 1), String.format("executors/%d", index), e));
+            }
             index++;
         }
         index = 0;
         for (OneOffExecutor e: oneOffExecutors) {
-            result.add(new DisplayExecutor("", String.format("oneOffExecutors/%d", index), e));
+            final AsynchronousExecution ae = e.getAsynchronousExecution();
+            if (ae == null || ae.displayCell()) {
+                result.add(new DisplayExecutor("", String.format("oneOffExecutors/%d", index), e));
+            }
             index++;
         }
         return result;

core/src/main/resources/lib/hudson/executors.jelly

@@ -39,8 +39,7 @@ THE SOFTWARE.
       <j:if test="${!c.acceptingTasks}"> <st:nbsp/> (${%suspended})</j:if>
     </d:tag>
     <d:tag name="executor">
-      <j:set var="ae" value="${e.asynchronousExecution}"/>
-      <j:if test="${(!c.offline or (c.offline and !e.idle)) and (ae == null || ae.displayCell())}">
+      <j:if test="${!c.offline or (c.offline and !e.idle)}">
           <tr>
             <td class="pane" align="right" style="vertical-align: top">
               ${name}