### 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
((Array)lines_edited_args[0])[0] = 1;
			((Array)lines_edited_args[0])[1] = 0;
			text_edit->undo();
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_text() == "testing\nswap");
			CHECK(text_edit->has_selection());
			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");
			((Array)lines_edited_args[0])[0] = 0;
			((Array)lines_edited_args[0])[1] = 1;
			text_edit->redo();
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_text() == "new\ntesting\nswap");
			CHECK(text_edit->has_selection());
			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");
			
			text_edit->select_all();
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->has_selection());
			CHECK(text_edit->get_selection_from_line() == 0);
			CHECK(text_edit->get_selection_to_line() == 2);
			SIGNAL_CHECK_FALSE("caret_changed");
			((Array)lines_edited_args[0])[0] = 2;
			((Array)lines_edited_args[0])[1] = 3;