Fix avatar size.

src/App.scss

@@ -122,10 +122,6 @@ main-router {
     background-color: rgba(0,0,0,0.1);
 }
 
-.media-left {
-    width: 10% !important;
-}
-
 .media-body {
     flex: 1;
     padding-left: 0.3em;