### Godot version

Godot 4.0 Beta 11

### System information

Linux Ubunutu

### Issue description

Godot's 3.x project converter to 4.0 seems to be missing the conversion for two drag data related functions.

In 3.x the function for can drop data, was named  `can_drop_data` in 4.0 it is `_can_drop_data`.
And likewise 3.x had `drop_data` and 4.0 has `_drop_data`.

These two functions were not converted by the project converter (and were hard to notice)!


### Steps to reproduce

Convert a 3.x project to 4.0 with the functions: `can_drop_data` it will not convert to `_can_drop_data` nor `drop_data` to `_drop_data`.



### Minimal reproduction project

N/A
//  map_to_world(a, b, c)  ->   map_to_cal(Vector3i(a, b, c))
	tains("map_to_world(")) {
		int start = line.find("map_to_world(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 3) {
				line = line.substr(0, start) + "map_to_cal(Vector3i(" + parts[0] + "," + parts[1] + "," + parts[2] + "))" + line.substr(end + start);
			 else .size() == 1) {
				line = line.substr(0, start) + "map_to_cal(" + parts[0] + ")" + line.substr(end + start);
			
		
	
	//  set_rotating(true)  ->   set_ignore_rotation(false)
	tains("set_rotating(")) {
		int start = line.find("set_rotating(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 1) {
				String oppite = parts[0] == "true" ? "false" : "true";
				line = line.substr(0, start) + "set_ignore_rotation(" + oppite + ")";
			
		
	
	//  OS.get_window_safe_area()  ->   DisplayServer.get_display_safe_area()
	tains("OS.get_window_safe_area(")) {
		int start = line.find("OS.get_window_safe_area(");