New menu item mark conversation as read

Signed-off-by: Vincent Petry <vincent@nextcloud.com>

src/components/LeftSidebar/ConversationsList/Conversation.vue

@@ -57,6 +57,11 @@
 				@click.stop.prevent="copyLinkToConversation">
 				{{ t('spreed', 'Copy link') }}
 			</ActionButton>
+			<ActionButton
+				:close-after-click="true"
+				@click.prevent.exact="markConversationAsRead">
+				{{ t('spreed', 'Mark as read') }}
+			</ActionButton>
 
 			<ActionSeparator />
 
@@ -313,6 +318,10 @@ export default {
 			}
 		},
 
+		markConversationAsRead() {
+			this.$store.dispatch('clearLastReadMessage', { token: this.item.token })
+		},
+
 		/**
 		 * Deletes the conversation.
 		 */