[ui] limit job display to 3

webui/src/components/layout/Jobs.svelte

@@ -44,12 +44,17 @@
   });
 </script>
 
-{#each activeJobs as job (job.id)}
+{#each activeJobs.slice(0, 3) as job (job.id)}
   <div class="job" transition:fade>
     <div class="job-label">{job.title}</div>
     <ProgessBar value={job.progress} />
   </div>
 {/each}
+{#if activeJobs.length > 3}
+  <div class="job-annotation">
+    + {activeJobs.length - 3} more jobs...
+  </div>
+{/if}
 
 <style scoped lang="scss">
   .job {