undo change, no magically added space please, just add Spacer by default

[aikomastboom]

I believe the idea for https://github.com/helix-editor/helix/pull/2996 was to be able to add a spacer if desired.

Looking ahead to https://github.com/helix-editor/helix/pull/1623 I prefer to have that space filled by git status.

This PR reverts functionality to give this choice back to the user.

[archseer]

See the discussion here https://github.com/helix-editor/helix/issues/3111

[aikomastboom]

Ah, I see.. so now we need an extra option to set the width of the margin between gutter and tekst. As the automatic adding of 1 is still reverting #2996 :)

[pascalkuthe]

I believe this was made obsolete with the spacing changes included in #3890