Queue the smallest backfill jobs first and show queued state

poc/public/media.css

@@ -740,3 +740,8 @@
     color: color-mix(in srgb, var(--color-neutral-400) 55%, transparent);
     font-style: italic;
 }
+
+.vk-bot-state-queued {
+    background: color-mix(in srgb, var(--color-neutral-400) 18%, transparent);
+    color: var(--color-neutral-300);
+}

poc/public/media.js

@@ -615,7 +615,7 @@
             row.append(progress);
 
             const actions = el("div", "vk-bot-job-actions");
-            if (job.state === "running") {
+            if (job.state === "running" || job.state === "queued") {
                 actions.append(button("Pause", () => void backfillAction("pause", job.chatId)));
             } else if (job.pending > 0) {
                 actions.append(button("Start", () => void backfillAction("start", job.chatId)));