Add key prop to NclistItem to re-render conversation with the appropr…

…iate class

Signed-off-by: DorraJaouad <dorra.jaoued7@gmail.com>

src/components/LeftSidebar/ConversationsList/Conversation.vue

@@ -21,6 +21,7 @@
 
 <template>
 	<NcListItem ref="listItem"
+		:key="item.token"
 		:title="item.displayName"
 		class="conversation-item"
 		:class="{'unread-mention-conversation': item.unreadMention}"