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 *ScrollDn2_disabled.xp_xpm[] = {
/* width height ncolors chars_per_pixel */
"15 15 10 1",
/* colors */
"a c #EEEEEE",
"b c #F1F1F1",
"c c #FBFBFB",
"d c #F4F4F4",
"e c #F7F7F7",
"f c #D5D5D5",
"g c #F6F6F6",
"h c #EFEFEF",
"i c #F2F2F2",
"j c none",
/* pixels */
"ccccccccccccccc",
"cediihhhhhhhagc",
"cdiiiihhhhhhhhc",
"ciiiiiihhhhhhhc",
"ciiiihhhhhhhhhc",
"cbiifhhhhhfhhhc",
"chifffhhhfffhhc",
"chhhfffhfffhhhc",
"chhhhfffffhhhhc",
"chhhhhfffhhhhhc",
"cahhhhhfhhhhhhc",
"cahhhhhhhhhhhhc",
"cahhhhhhhhhhhhc",
"cghhhhhhhhhhhgc",
"ccccccccccccccc",
};