refactor(front): consistent layouts on explore

front/src/components/audio/ChannelsWidget.vue

@@ -63,7 +63,7 @@ fetchData()
 <template>
   <div>
     <slot />
-    <Layout grid>
+    <Layout flex>
       <Loader v-if="isLoading" />
       <channel-card
         v-for="object in channels"

front/src/components/library/Home.vue

@@ -81,7 +81,7 @@ fetchData()
     <channels-widget
       :show-modification-date="true"
       :limit="12"
-      :filters="{ordering: '-creation_date', external: 'false'}"
+      :filters="{ordering: '-creation_date', external: 'true'}"
     />
   </template>