improvements to artist feed, now displays artists followed

src/renderer/views/components/mediaitem-scroller-horizontal.ejs

@@ -1,6 +1,7 @@
 <script type="text/x-template" id="mediaitem-scroller-horizontal">
     <template>
         <div class="cd-hmedia-scroller" :class="kind">
+            <slot></slot>
             <mediaitem-square :kind="kind" :item="item"
                               v-for="item in items"></mediaitem-square>
         </div>
@@ -13,7 +14,7 @@
         props: {
             'items': {
                 type: Array,
-                required: true
+                required: false
             },
             'kind': {
                 type: String,