Issue #124, case 1: Added test for this case
Actual fix is in stx:libbasic, revision 3563e89f551b.
https://swing.fit.cvut.cz/projects/stx-jv/ticket/124#comment:19
/* XPM */
static char *ScrollUp_active.xp_xpm[] = {
/* width height ncolors chars_per_pixel */
"16 16 13 1",
/* colors */
"a c black",
"b c #70A0D0",
"c c #F0F0F0",
"d c #A0B0D0",
"e c #C0D0D0",
"f c #80A0D0",
"g c #A0C0D0",
"h c #B0C0D0",
"i c #A0C0E0",
"j c #7090D0",
"k c #406080",
"l c #90B0D0",
"m c none",
/* pixels */
"mmccccccccccccmm",
"mddfffffffffjdcm",
"cdffffffffffffce",
"cfffffffffffffch",
"cffffffkffffffch",
"cfffffkkkfffffcd",
"cffffkkkkkffffcd",
"cfffkkkfkkkfffcd",
"cffkkkfffkkkffcl",
"cfffkfffffkfffcl",
"cjffffffffffffcl",
"cjffffffffffffcl",
"cjffffffffffffcd",
"cdfffffffffffdcg",
"mcccccccccccccim",
"mmlfbjjjjbbbflmm",
};