### Godot version

4.0 beta 15

### System information

Windows 10

### Issue description

It happened with both Google IME and MS-IME, and there was no problem until Beta14.
When typing Japanese characters, it is common to select a character from the suggestion window and then start typing the next character before confirming.
In this case, uncommitted characters are forcibly committed, and input of the next character begins.

**↓Beta15**

https://user-images.githubusercontent.com/186786/214753450-b493cca6-2644-4b3d-8cd2-660565cc3547.mp4

**↓Beta14**

https://user-images.githubusercontent.com/186786/214755127-dde819cc-4d63-403a-99b0-09821671f74e.mp4



### Steps to reproduce

It happened with both Google IME and MS-IME in beta15

### Minimal reproduction project

It is project independent and happens in the editor.
ERR_FAIL_INDEX(p_from_line, text.size());
	ERR_FAIL_INDEX(p_from_column, text[p_from_line].length() + 1);
	ERR_FAIL_INDEX(p_to_line, text.size());
	ERR_FAIL_INDEX(p_to_column, text[p_to_line].length() + 1);
	ERR_FAIL_COND(p_to_line < p_from_line);
	ERR_FAIL_COND(p_to_line == p_from_line && p_to_column < p_from_column);
	_remove_text(p_from_line, p_from_column, p_to_line, p_to_column);
}
int TextEdit::get_last_unhidden_line() const {
	
	if (!_is_hiding_enabled()) {
		return text.size() - 1;
	}
	int last_line;
	for (last_line = text.size() - 1; last_line > 0; last_line--) {
		if (!_is_line_hidden(last_line)) {
			break;
		}
	}
	return last_line;
}
int TextEdit::get_next_visible_line_offset_from(int p_line_from, int p_visible_amount) const {