fix(RightSidebar): move unread messages notifications discard to RightSidebar

Signed-off-by: Grigorii K. Shartsev <me@shgk.me>

src/components/RightSidebar/RightSidebar.vue

@@ -391,6 +391,9 @@ export default {
 
 	beforeDestroy() {
 		unsubscribe('spreed:select-active-sidebar-tab', this.handleUpdateActive)
+
+		// Discard current chat notifications
+		this.notifyUnreadMessages(null)
 	},
 
 	methods: {

src/components/TopBar/TopBar.vue

@@ -268,7 +268,6 @@ export default {
 	},
 
 	beforeDestroy() {
-		this.notifyUnreadMessages(null)
 		document.removeEventListener('fullscreenchange', this.fullScreenChanged, false)
 		document.removeEventListener('mozfullscreenchange', this.fullScreenChanged, false)
 		document.removeEventListener('MSFullscreenChange', this.fullScreenChanged, false)