UI: Change exec button to not show on dead jobs (#7548)

I still want to add acceptance tests for the existence
of these buttons but this change makes the exec button
for jobs behave similarly to the others.

ui/app/templates/components/job-page/parts/title.hbs

@@ -5,10 +5,10 @@
   </div>
   {{yield}}
   <div>
-    <div class="two-step-button">
-      {{exec/open-button job=job}}
-    </div>
     {{#if (not (eq job.status "dead"))}}
+      <div class="two-step-button">
+        {{exec/open-button job=job}}
+      </div>
       {{two-step-button
         data-test-stop
         idleText="Stop"