embark-collect: Add column in front for marker character

[minad]

Dired puts a dired-marker-char in front of marked files. Ibuffer does the same. Maybe we should also add such an indicator to Embark Collect?

[oantolin]

Sure, now that grid view is dead, this is probably a better option, more Emacsy.

[minad]

Well, I would also keep the overlay/background. The indicator char in front is just another addition to align the Embark buffer a little more with Dired.

[oantolin]

Oh, yes, I meant to keep the special face as well, just like dired and ibuffer, which use both a character and a face.

[oantolin]

There is a tabulated-list-put-tag function that one can use for this purpose.

[oantolin]

Now that we use the new selection functionality instead, I think I don't want a marker character, for uniformity with regular buffers where I certainly don't want such a character.