remove font-size middium to apply default font size 14px

packages/app/src/styles/_page-tree.scss

@@ -37,7 +37,6 @@ $grw-pagetree-item-padding-left: 10px;
 
       .grw-pagetree-title {
         overflow: hidden;
-        font-size: medium;
         text-overflow: ellipsis;
       }
     }