Draw: Curve outline drawing in object mode.

This patch adds (selected/active) outline around a curve object in object mode.

{F13270680}

In the past the draw bounds option was enabled for any curve objects. With this
patch it isn't needed and will be disabled.

In the future the curve outline could also be enabled to improve GPU selection.

Reviewed By: dfelinto, HooglyBoogly, fclem

Maniphest Tasks: T95933

Differential Revision: https://developer.blender.org/D15308

source/blender/editors/curves/intern/curves_ops.cc

@@ -465,7 +465,6 @@ static int curves_convert_from_particle_system_exec(bContext *C, wmOperator *UNU
   }
 
   Object *ob_new = BKE_object_add(&bmain, &view_layer, OB_CURVES, psys_eval->name);
-  ob_new->dtx |= OB_DRAWBOUNDOX; /* TODO: Remove once there is actual drawing. */
   Curves *curves_id = static_cast<Curves *>(ob_new->data);
   BKE_object_apply_mat4(ob_new, ob_from_orig->obmat, true, false);
   bke::CurvesGeometry::wrap(curves_id->geometry) = particles_to_curves(*ob_from_eval, *psys_eval);