Add a button to remove videos watched with more than X percent from watch later playlist.
yt-playlists-delete-enhancer 已被删除，原因为：举报 #14340。
由作者提交的申诉：
Hi there !
In my latest version 1.5.7 I removed the modification optimization from the bundling phase. Everything should be in order now.
管理员通过了此申诉，并解除了该则脚本的删除状态。
