Fix recently listened widget and simple artist serializer

(cherry picked from commit 071ff89a)

api/funkwhale_api/history/views.py

@@ -56,7 +56,9 @@ class ListeningViewSet(
         )
         tracks = Track.objects.with_playable_uploads(
             music_utils.get_actor_from_request(self.request)
-        ).select_related("artist", "album__artist", "attributed_to")
+        ).select_related(
+            "artist", "album__artist", "attributed_to", "artist__attachment_cover"
+        )
         return queryset.prefetch_related(Prefetch("track", queryset=tracks))
 
     def get_serializer_context(self):

front/src/components/audio/track/Widget.vue

@@ -8,6 +8,8 @@
       <div :class="['item', itemClasses]" v-for="object in objects" :key="object.id">
         <div class="ui tiny image">
           <img alt="" v-if="object.track.album && object.track.album.cover" v-lazy="$store.getters['instance/absoluteUrl'](object.track.album.cover.urls.medium_square_crop)">
+          <img alt="" v-else-if="object.track.cover" v-lazy="$store.getters['instance/absoluteUrl'](object.track.cover.urls.medium_square_crop)"/>
+          <img alt="" v-else-if="object.track.artist.cover" v-lazy="$store.getters['instance/absoluteUrl'](object.track.artist.cover.urls.medium_square_crop)"/>
           <img alt="" v-else src="../../../assets/audio/default-cover.png">
           <play-button class="play-overlay" :icon-only="true" :button-classes="['ui', 'circular', 'tiny', 'vibrant', 'icon', 'button']" :track="object.track"></play-button>
         </div>