Hard tabs are not shown correctly

Hard tabs are shown with two spaces instead of eight spaces:

Is this configurable, or can gitui follow `.editorconfig` of the project?

No source file, test, or entry point is named. Reproduce the tab display in gitui using a project with hard tabs, then locate the relevant rendering or configuration behavior; done means tabs display with the intended width or the supported configuration is documented and tested.

Written by the indexing model from the issue text.