### Godot version

4.2 dev3

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

If you have a Method Track with multiple calls to the same method, they are joined together and makes things unreadable:
![image](https://github.com/godotengine/godot/assets/2223172/a2ab8446-28a1-440b-b0d5-5049f5d705b4)
The horizontal line shouldn't be used here. I think it might be a regression.

### Steps to reproduce

1. Add AnimationPlayer
2. Add a Method Track (with Add Track button)
3. Add some key to the track
4. Add another key with the same method

### Minimal reproduction project

N/A
timecolor.a = 0.2;
			Color linecolor = color;
			linecolor.a = 0.2;
			{
				draw_rect(Rect2(Point2(get_name_limit(), 0), Point2(zoomw - 1, h)), notimecol);
				if (begin_px < zoomw && end_px > 0) {
					if (begin_px < 0) {
						begin_px = 0;
					}
					if (end_px > zoomw) {
						end_px = zoomw;
					}
					draw_rect(Rect2(Point2(get_name_limit() + begin_px, 0), Point2(end_px - begin_px, h)), timecolor);
				}
			}
			Color color_time_sec = color;
			Color color_time_dec = color;
			color_time_dec.a *= 0.5;
#define SC_ADJ 100
			int dec = 1;
			int step = 1;
			int decimals = 2;
			bool step_found = false;
			const float period_width = font->get_char_size('.', font_size).width;
			float max_digit_width = font->get_char_size('0', font_size).width;
			for (int i = 1; i <= 9; i++) {
				const float digit_width = font->get_char_size('0' + i, font_size).width;
				max_digit_width = MAX(digit_width, max_digit_width);
			}
			const int max_sc = int(Math::ceil(zoomw / scale));