May not work when feature preview "New Repository Overview" is enabled

[reorx]

The extension was developed with "New Repository Overview" disabled.

According to user feedback from https://t.me/c/1624242576/4772, the extension may not work when it's enabled:

博主，假如开启了 github 的 New Repository Overview 这个 Feature preview ，目录似乎就不显示，而是在这个位置。提醒一下防止有人又以为插件不工作。

This should be fixed to support both situations.