some initial work to make it possible to use "unregistered" timelines, i.e. not

reserving a timeline by name, instead just passing timeline object itself.

src/components/user_profile/user_profile.js

@@ -1,6 +1,7 @@
 import UserCardContent from '../user_card_content/user_card_content.vue'
 import UserCard from '../user_card/user_card.vue'
 import Timeline from '../timeline/timeline.vue'
+import { emptyTl } from '../../modules/statuses.js'
 
 const UserProfile = {
   created () {
@@ -13,6 +14,11 @@ const UserProfile = {
   destroyed () {
     this.$store.dispatch('stopFetching', 'user')
   },
+  data () {
+    return {
+      favorites: emptyTl({ type: 'favorites', userId: this.userId })
+    }
+  },
   computed: {
     timeline () {
       return this.$store.state.statuses.timelines.user