`ScrollableView`: merge (some) changes from eXept
...to make it work with recent UI builder.
#define ScrollDnMotif_width 11
#define ScrollDnMotif_height 12
static unsigned char ScrollDnMotif_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x00, 0xf8, 0x00, 0x70, 0x00,
0x70, 0x00, 0x20, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};