In the animation editors, show the FCurve Modifier toggle widget (the wrench) as 'inactive' when the FCurve has no modifiers on it. Previously the (lack of) existence of FCurve modifiers was not reflected in the wrench icon at all. Note: this only affects FCurves, and not FCurve *Groups*. Pull Request: https://projects.blender.org/blender/blender/pulls/106214