Fix review details

- spelling mistake
- unwatch watched setting
- lint (indentation)
- use more performant component

res/css/views/avatars/_PulsedAatar.scss

@@ -1,30 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-.mx_PulsedAvatar {
-    @keyframes shadow-pulse {
-        0% {
-            box-shadow: 0 0 0 0px rgba($accent-color, 0.2);
-        }
-        100% {
-            box-shadow: 0 0 0 6px rgba($accent-color, 0);
-        }
-    }
-
-    img {
-        animation: shadow-pulse 1s infinite;
-    }
-}