Merge pull request #5897 from matrix-org/travis/error-states

Improve message error states

src/stores/notifications/StaticNotificationState.ts

@@ -18,6 +18,8 @@ import { NotificationColor } from "./NotificationColor";
 import { NotificationState } from "./NotificationState";
 
 export class StaticNotificationState extends NotificationState {
+    public static readonly RED_EXCLAMATION = StaticNotificationState.forSymbol("!", NotificationColor.Red);
+
     constructor(symbol: string, count: number, color: NotificationColor) {
         super();
         this._symbol = symbol;