### Godot version

4.2.beta.custom_build [51f81e1c8]

### System information

macOS 11.0+

### Issue description

I could sense a recent merging of a few pull requests on here:

<img width="865" alt="image" src="https://github.com/godotengine/godot/assets/1129695/1cf7d144-a4d2-4514-abca-1405222e702a">

This bug has the following related merges as the most recent ones:

https://github.com/godotengine/godot/pull/80813
https://github.com/godotengine/godot/pull/80939

The pull requests are for reviving onion-skinning capabilities, but this causes a minor unexpected result (see Steps to reproduce)



### Steps to reproduce

## A. Use 4.2.beta.custom_build [51f81e1c8]

1. Obtain the attached minimal reproduction project
2. Select the AnimationPlayer node
<img width="1468" alt="image" src="https://github.com/godotengine/godot/assets/1129695/ca16d7a6-7690-45b4-b8f9-b12fded64ca4">
3. In the Animation panel, click "Edit" to find your shortcuts for "Go to Next Step" and "Go to Previous Step"
<img width="410" alt="image" src="https://github.com/godotengine/godot/assets/1129695/a708e196-2eb9-42ea-bf0e-fd0aa88a9e60">
4. Use the shortcuts to spam go back and forth the animation

Expected result: animation goes smoothly

https://github.com/godotengine/godot/assets/1129695/c24c498c-7f77-4cc9-a1c9-a1627d89c58b



Actual result: animation jumps crazily


https://github.com/godotengine/godot/assets/1129695/947bf5b4-a0ab-42d4-bb5b-201800b4bdc6


https://github.com/godotengine/godot/assets/1129695/65303cd0-8c2d-4a35-9d16-c94752ac2e3a




## B. My successful yet unverified fix attempt on 4.2.beta.custom_build [51f81e1c8]

Either by:

<img width="831" alt="image" src="https://github.com/godotengine/godot/assets/1129695/80d167ae-27e7-4ec4-a4c9-ffc7adc0353f">


Or by:

<img width="806" alt="image" src="https://github.com/godotengine/godot/assets/1129695/2bae8697-8ef3-48dc-9f0a-2b5fe568ed43">


I don't see any negative impact on Onion Skinning or other functions by the above fix attempt, but I am not sure, I need someone to help me verify this.



### Minimal reproduction project

[gd_anim_unittest_1.zip](https://github.com/godotengine/godot/files/12909805/gd_anim_unittest_1.zip)






time_icon = memnew(TextureRect);
	time_icon->set_v_size_flags(SIZE_SHRINK_CENTER);
	time_icon->set_tooltip_text(TTR("Animation length (seconds)"));
	len_hb->add_child(time_icon);
	length = memnew(EditorSpinSlider);
	length->set_min(0.0001);
	length->set_max(36000);
	length->set_step(0.0001);
	length->set_allow_greater(true);
	length->set_custom_minimum_size(Vector2(70 * EDSCALE, 0));
	length->set_hide_slider(true);
	length->set_tooltip_text(TTR("Animation length (seconds)"));
	length->connect("value_changed", callable_mp(this, &AnimationTimelineEdit::_anim_length_changed));
	len_hb->add_child(length);
	loop = memnew(Button);
	loop->set_flat(true);
	loop->set_tooltip_text(TTR("Animation Looping"));
	loop->connect("pressed", callable_mp(this, &AnimationTimelineEdit::_anim_loop_pressed));
	loop->set_toggle_mode(true);
	len_hb->add_child(loop);
	add_child(len_hb);
	add_track->hide();
	add_track->get_popup()->connect("index_pressed", callable_mp(this, &AnimationTimelineEdit::_track_added));
	len_hb->hide();
	panner.instantiate();
	panner->set_callbacks(callable_mp(this, &AnimationTimelineEdit::_pan_callback), callable_mp(this, &AnimationTimelineEdit::_zoom_callback));
	panner->set_pan_axis(ViewPanner::PAN_AXIS_HORIZONTAL);
	set_layout_direction(Control::LAYOUT_DIRECTION_LTR);
}
void AnimationTrackEdit::_notification(int p_what) {