message: fix(configs): new value could be empty when deleting
diff: @@ -193,6 +193,7 @@ export async function addActiveConfigListener (
  if (changes.activeConfigID) {
  const { newValue: newID, oldValue: oldID } = changes.activeConfigID
  + if (!newID) { return }
  gActiveConfigID = newID
  if (oldID) {
  const obj = await storage.sync.get([oldID, newID])
  