### 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
if (foundNextEqual) {
			line = line.substr(0, start) + "ignore_rotation =" + assigned_value + " # reversed \"rotating\" for Camera2D";
		
	
	 -> Time functions
	tains("OS.get_ticks_msec")) {
		line = line.replace("OS.get_ticks_msec", "Time.get_ticks_msec");
	
	tains("OS.get_ticks_usec")) {
		line = line.replace("OS.get_ticks_usec", "Time.get_ticks_usec");
	
	tains("OS.get_unix_time")) {
		line = line.replace("OS.get_unix_time", "Time.get_unix_time_from_system");
	
	tains("OS.get_datetime")) {
		line = line.replace("OS.get_datetime", "Time.get_datetime_dict_from_system");
	
void rter3To4::process_csharp_line(String &line, const RegExContainer &reg_container) {
	line = line.replace("OS.GetWindowSafeArea()", "DisplayServer.ScreenGetUsableRect()");
	// -- Connect(,,,things) -> Connect(,Callable(,),things)      Object
	tains("Connect(")) {
		int start = line.find("Connect(");
		// Protection from disconnect
		if (start == 0 || line.get(start - 1) != 's') {
			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) + "Connect(" + parts[0] + ",new Callable(" + parts[1] + "," + parts[2] + ")" + connect_arguments, 3) + ")" + line.substr(end + start);