orange4glace

While I'm working on this with my own, here's my idea how it should be implemented.  If `verticalTabs` option is introduced, there're 6 combinations editor should consider....

> 1. To have the option to have the vertical tabs as a panel like the File Explorer and the Outline panels. That way we can have the files and...

Simply right click on any list header will show context menu for toggling it.

Weird. It's a [built-in functionality](https://github.com/microsoft/vscode/blob/master/src/vs/workbench/contrib/files/browser/views/openEditorsView.ts) since many years ago.

@markrickert Thanks for your work. BTW, I think your code is for loading texture from its own package. How can I load a texture from FileSystem? (ex: pick an image...