Fix some Avatar related css bugs

• fix user card avatar being way too small and with wrong styles
• fix chat/notification avatars not respecting the gif animation settings

src/components/chat_message/chat_message.scss

@@ -2,7 +2,7 @@
 
 .chat-message-wrapper {
   &.hovered-message-chain {
-    .animated.avatar {
+    .animated.Avatar {
       canvas {
         display: none;
       }