### Godot version

4.1

### System information

Windows

### Issue description

Being able to have multiple cursors similarly to vscode is a great feature, however it's only possible to add carets, not remove them. By left clicking you can remove all extra cursors but you cannot remove a specific one so after selecting multiple lines a single missclick, you have to reselect them all again. Looking at the original pr there was a remove_caret function added so it would make sense to be able to remove carets when clicking again, like in vscode.

![image](https://github.com/godotengine/godot/assets/19669673/3867c00e-9faa-4429-9c6d-f2d6d3883044)


### Steps to reproduce

- Alt click to add multiple carets
- Alt click on the same position again
- Nothing happens

### Minimal reproduction project

N/A
}
				}
			}
			int top_limit_y = 0;
			int bottom_limit_y = get_size().height;
			if (!editable) {
				top_limit_y += theme_cache.style_readonly->get_margin(SIDE_TOP);
				bottom_limit_y -= theme_cache.style_readonly->get_margin(SIDE_BOTTOM);
			} else {
				top_limit_y += theme_cache.style_normal->get_margin(SIDE_TOP);
				bottom_limit_y -= theme_cache.style_normal->get_margin(SIDE_BOTTOM);
			}
			
			line_drawing_cache.clear();
			int row_height = draw_placeholder ? placeholder_line_height + theme_cache.line_spacing : get_line_height();
			int line = first_vis_line;
			for (int i = 0; i < draw_amount; i++) {
				line++;
				if (line < 0 || line >= (int)text.size()) {
					continue;
				}
				while (_is_line_hidden(line)) {
					line++;
					if (line < 0 || line >= (int)text.size()) {
						break;
					}
				}
				if (line < 0 || line >= (int)text.size()) {
					continue;
				}