### Godot version

4.0 stable

### System information

Manjaro Linux, kernel 6.1.1-1-MANJARO, AMD Ryzen 5 3600, AMD RX 580

### Issue description

The `wrap_mode` property of the `TextEdit` node doesn't seem to really do anything. Setting it to `LINE_WRAPPING_BOUNDARY` simply means that there won't be an horizontal scrollbar if the text overshoots the boundary, instead of actually forcing the text to the next line so that it stays visible.

### Steps to reproduce

Create a TextEdit node and set its `wrap_mode` property to `LINE_WRAPPING_BOUNDARY`

### Minimal reproduction project

[WrapBugDemo.zip](https://github.com/godotengine/godot/files/10875969/WrapBugDemo.zip)

if (!text_editor->has_selection(c)) {
				caret_group_parameters.push_back(Vector<int>{ -1, -1, -1, -1, cursor_line, cursor_column });
				continue;
			}
			int from_line = text_editor->get_selection_from_line(c);
			int from_col = text_editor->get_selection_from_column(c);
			int to_line = text_editor->get_selection_to_line(c);
			int to_column = text_editor->get_selection_to_column(c);
			caret_group_parameters.push_back(Vector<int>{ from_line, from_col, to_line, to_column, cursor_line, cursor_column });
		}
		for (int line_id = group_borders[i].first; line_id <= group_borders[i].second; line_id++) {
			text_editor->unfold_line(line_id);
			text_editor->unfold_line(line_id - 1);
			text_editor->swap_lines(line_id - 1, line_id);
		}
		for (int j = 0; j < caret_groups[i].size(); j++) {
			int c = caret_groups[i][j];
			Vector<int> caret_parameters = caret_group_parameters[j];
			text_editor->set_caret_line(caret_parameters[4] - 1, c == 0, true, 0, c);
			text_editor->set_caret_column(caret_parameters[5], c == 0, c);
			if (caret_parameters[0] >= 0) {
				text_editor->select(caret_parameters[0] - 1, caret_parameters[1], caret_parameters[2] - 1, caret_parameters[3], c);
			}
		}
	}
	text_editor->end_complex_operation();
	text_editor->merge_overlapping_carets();
	text_editor->queue_redraw();
}
void CodeTextEditor::move_lines_down() {