Floating menu option (#726)

* Add floating menu

* Fix

* Updates

* Add auto-queue change test

* Fix

src/services/autoQueueService.ts

@@ -0,0 +1,41 @@
+import {
+  useQueueSettingsStore,
+  useQueuePendingTaskCountStore
+} from '@/stores/queueStore'
+import { app } from '@/scripts/app'
+import { api } from '@/scripts/api'
+
+export function setupAutoQueueHandler() {
+  const queueCountStore = useQueuePendingTaskCountStore()
+  const queueSettingsStore = useQueueSettingsStore()
+
+  let graphHasChanged = false
+  let internalCount = 0 // Use an internal counter here so it is instantly updated when re-queuing
+  api.addEventListener('graphChanged', () => {
+    if (queueSettingsStore.mode === 'change') {
+      if (internalCount) {
+        graphHasChanged = true
+      } else {
+        graphHasChanged = false
+        app.queuePrompt(0, queueSettingsStore.batchCount)
+        internalCount++
+      }
+    }
+  })
+
+  queueCountStore.$subscribe(
+    () => {
+      internalCount = queueCountStore.count
+      if (!internalCount && !app.lastExecutionError) {
+        if (
+          queueSettingsStore.mode === 'instant' ||
+          (queueSettingsStore.mode === 'change' && graphHasChanged)
+        ) {
+          graphHasChanged = false
+          app.queuePrompt(0, queueSettingsStore.batchCount)
+        }
+      }
+    },
+    { detached: true }
+  )
+}