Option to disable tab to indent

[blue_emperor]

@FinetalPies

There is an “Indent using tabs” option, which seemingly doesn’t change the functionality of the Tab key at all, and just adds the ability to start a line with four spaces to create an indent.
Version v1.8.10

I tested Indent using tabs setting on v1.8.10:

Indent using tabs = ON:
When pressing tab then character U+0009 is produced (tab character)

Indent using tabs = OFF:
When pressing tab then four spaces U+0020 are produced

On both cases indentation happens using the tab key but the setting dictates whether the indentation uses the tab character or four spaces.