### 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
text_edit->insert_line_at(2, "after");
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_text() == "new\ntesting\nafter\nswap");
			CHECK(text_edit->get_caret_line() == 3);
			CHECK(text_edit->get_caret_column() == text_edit->get_line(3).size() - 1);
			CHECK(text_edit->has_selection());
			CHECK(text_edit->get_selection_from_line() == 0);
			CHECK(text_edit->get_selection_to_line() == 3);
			SIGNAL_CHECK("lines_edited_from", lines_edited_args);
			SIGNAL_CHECK("caret_changed", empty_signal_args);
			SIGNAL_CHECK("text_changed", empty_signal_args);
			SIGNAL_CHECK_FALSE("text_set");
			
			ERR_PRINT_OFF;
			text_edit->insert_line_at(-1, "after");
			CHECK(text_edit->get_text() == "new\ntesting\nafter\nswap");
			SIGNAL_CHECK_FALSE("lines_edited_from");
			SIGNAL_CHECK_FALSE("caret_changed");
			SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("text_set");
			text_edit->insert_line_at(4, "after");
			CHECK(text_edit->get_text() == "new\ntesting\nafter\nswap");
			SIGNAL_CHECK_FALSE("lines_edited_from");
			SIGNAL_CHECK_FALSE("caret_changed");
			SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("text_set");
			ERR_PRINT_ON;
		}
		SUBCASE("[TextEdit] insert line at caret") {
			lines_edited_args.pop_back();