### 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 (i == end) {
				len = end_col;
			}
			if (i == begin) {
				len -= begin_col;
			}
			String new_line = text_editor->get_line(i).substr(i == begin ? begin_col : 0, len);
			switch (p_case) {
				case UPPER: {
					new_line = new_line.to_upper();
				} break;
				case LOWER: {
					new_line = new_line.to_lower();
				} break;
				case CAPITALIZE: {
					new_line = new_line.capitalize();
				} break;
			}
			if (i == begin) {
				new_line = text_editor->get_line(i).left(begin_col) + new_line;
			}
			if (i == end) {
				new_line = new_line + text_editor->get_line(i).substr(end_col);
			}
			text_editor->set_line(i, new_line);
		}
	}
	text_editor->end_complex_operation();
}
void CodeTextEditor::move_lines_up() {