Fix missing undo steps for smooth-view operators

Support pushing undo steps for smooth-view operations that manipulate
the camera. Now V3D_SmoothParams take optional undo arguments.

Used for:

- VIEW3D_OT_view_center_cursor
- VIEW3D_OT_view_center_pick
- VIEW3D_OT_view_orbit
- VIEW3D_OT_view_roll
- VIEW3D_OT_zoom_border

Follow up fix for T92099.

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/editors/space_view3d/view3d_navigate_roll.c b/source/blender/editors/space_view3d/view3d_navigate_roll.c
index 087ca72211e..3c15fdf3b64 100644
--- a/source/blender/editors/space_view3d/view3d_navigate_roll.c
+++ b/source/blender/editors/space_view3d/view3d_navigate_roll.c
@@ -202,6 +202,9 @@ static int viewroll_exec(bContext *C, wmOperator *op)
                           &(const V3D_SmoothParams){
                               .quat = quat_new,
                               .dyn_ofs = dyn_ofs_pt,
+                              /* Group as successive roll may run by holding a key. */
+                              .undo_str = op->type->name,
+                              .undo_grouped = true,
                           });
 
     viewops_data_free(C, op->customdata);