make avatar 24px and tile height 32px

res/css/views/rooms/_RoomTile.scss

@@ -19,7 +19,7 @@ limitations under the License.
     flex-direction: row;
     align-items: center;
     cursor: pointer;
-    height: 40px;
+    height: 32px;
     margin: 0;
     padding: 0 8px 0 10px;
     position: relative;

src/components/views/rooms/RoomTile.js

@@ -333,7 +333,7 @@ module.exports = React.createClass({
         >
             <div className={avatarClasses}>
                 <div className="mx_RoomTile_avatar_container">
-                    <RoomAvatar room={this.props.room} width={32} height={32} />
+                    <RoomAvatar room={this.props.room} width={24} height={24} />
                     { dmIndicator }
                 </div>
             </div>