web/ProcessingQueue: open the queue popover when new item is added

web/src/lib/state/queue-visibility.ts

@@ -0,0 +1,10 @@
+import { get, writable } from "svelte/store";
+
+export const queueVisible = writable(false);
+
+export const showQueuePopover = () => {
+    const visible = get(queueVisible);
+    if (!visible) {
+        return queueVisible.update(v => !v);
+    }
+}