Fix: Long menu entries (>14 or >18 chars) caused overrun in hitachi display implementation

Some languages/translations use menu strings >14 chars which caused a display corruption (overrun) on 16x2 displays. There are also some translations which use more than 18 chars which caused display corruption on 16x2 and 20x4 displays.

This is fixed now. All menu strings are clipped properly at the defined display_width.