HUDSON-8252 FIXED offline slaves wasting space in status list

There is a lot of wasted space on the Build Executor Status when
slave nodes are offline. The space can be reclaimed by simply
not displaying offline executors for offline slaves.

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

@@ -126,12 +126,16 @@ THE SOFTWARE.
             </j:otherwise>
           </j:choose>
         </tr>
-        <j:forEach var="e" items="${c.executors}" varStatus="eloop">
-          <local:executor name="${eloop.index+1}" url="executors/${eloop.index}" />
-        </j:forEach>
-        <j:forEach var="e" items="${c.oneOffExecutors}" varStatus="eloop">
-          <local:executor name="" url="oneOffExecutors/${eloop.index}" />
-        </j:forEach>
+        <j:choose>
+	  <j:when test="${!c.offline}">
+            <j:forEach var="e" items="${c.executors}" varStatus="eloop">
+              <local:executor name="${eloop.index+1}" url="executors/${eloop.index}" />
+            </j:forEach>
+            <j:forEach var="e" items="${c.oneOffExecutors}" varStatus="eloop">
+              <local:executor name="" url="oneOffExecutors/${eloop.index}" />
+            </j:forEach>
+	  </j:when>
+	</j:choose>
       </j:forEach>
     </l:pane>
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