[Plugin: Advanced WordPress Theme Editor] feedback: file tree is necessary

One thing this plugin lacks, the ability to show file tree of the theme. Some themes store CSS files inside a sub dir, and those are not displayed in the main files list.

I had to use another theme which is solid-code-theme-editor to see the files, but sadly that editor lacks the important other features your theme has to offer.

http://ww.wp.xz.cn/extend/plugins/advanced-wordpress-theme-editor/