### Godot version

v4.0.beta.custom_build [13f0158]

### System information

Windows 10

### Issue description

When doing operations (`begin_complex_operation` and `end_complex_operation`) with multiple selections in TextEdit, some of these selections don't revert upon undo. This behavior is affects some of script editor's operations, like duplicate selection and delete lines.

### Steps to reproduce

Open script editor, make multiple selections. Keep in mind what you have selected. Do duplicate selection (ctrl+shift+D). Undo (ctrl+Z). Compare the result to what you remember.

### Minimal reproduction project

N/A
return deselect_on_focus_loss_enabled;
}
void TextEdit::set_drag_and_drop_selection_enabled(const bool p_enabled) {
	drag_and_drop_selection_enabled = p_enabled;
}
bool TextEdit::is_drag_and_drop_selection_enabled() const {
	return drag_and_drop_selection_enabled;
}
void TextEdit::set_selection_mode(SelectionMode p_mode, int p_line, int p_column, int p_caret) {
	ERR_FAIL_INDEX(p_caret, carets.size());
	selecting_mode = p_mode;
	if (p_line >= 0) {
		ERR_FAIL_INDEX(p_line, text.size());
		carets.write[p_caret].selection.selecting_line = p_line;
		carets.write[p_caret].selection.selecting_column = CLAMP(carets[p_caret].selection.selecting_column, 0, text[carets[p_caret].selection.selecting_line].length());
	}
	if (p_column >= 0) {
		ERR_FAIL_INDEX(carets[p_caret].selection.selecting_line, text.size());
		ERR_FAIL_INDEX(p_column, text[carets[p_caret].selection.selecting_line].length() + 1);
		carets.write[p_caret].selection.selecting_column = p_column;
	}
}
TextEdit::SelectionMode TextEdit::get_selection_mode() const {