### 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.
remove_secondary_carets();
	if (p_select) {
		_pre_shift_selection(0);
	} else {
		deselect();
	}
	set_caret_line(0, false);
	set_caret_column(0);
	if (p_select) {
		_post_shift_selection(0);
	}
}
void TextEdit::_move_caret_document_end(bool p_select) {
	remove_secondary_carets();
	if (p_select) {
		_pre_shift_selection(0);
	} else {
		deselect();
	}
	set_caret_line(get_last_unhidden_line(), true, false, 9999);
	set_caret_column(text[get_caret_line()].length());
	if (p_select) {
		_post_shift_selection(0);
	}
}
bool TextEdit::_clear_carets_and_selection() {