fix changeable height

Author: DIYgod

src/css/index.scss

@@ -330,6 +330,7 @@ $aplayer-height-lrc: $aplayer-height + $lrc-height - 6;
             user-select: text;
             cursor: default;
             padding-bottom: 2px;
+            height: 20px;
 
             .aplayer-title {
                 font-size: 14px;