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 *ScrollRt_disabled.xp_xpm[] = {
/* width height ncolors chars_per_pixel */
"17 16 19 1",
/* colors */
"a c #E4E4E4",
"b c #C5C5C5",
"c c #EDEDED",
"d c #F0F0F0",
"e c #ACACAC",
"f c #D4D4D4",
"g c #DDDDDD",
"h c #E6E6E6",
"i c #E9E9E9",
"j c #CACACA",
"k c #CDCDCD",
"l c #D6D6D6",
"m c #DCDCDC",
"n c #DFDFDF",
"o c #E5E5E5",
"p c #7F7F7F",
"q c #F7F7F7",
"r c #DBDBDB",
"s c none",
/* pixels */
"ssqqqqqqqqqqqqqss",
"sdihhhnnnnnnngcqs",
"qihhhhinnnnnnnnqo",
"qhhhhhhennnnnnnqg",
"qhhhhheeennnnnnqg",
"qahhhhheeennnnnql",
"qnhhhhhneeennnnql",
"qnhhhhhnneeennnql",
"qnhhhhnneeennnnqf",
"qnhhnnneeennnnnqf",
"qgnnnneeennnnnnqf",
"qgnnnnnennnnnnnqf",
"qgnnnnnnnnnnnnnql",
"qcnnnnnnnnnnnncqr",
"sqqqqqqqqqqqqqqms",
"ssfkkjbbbbjjjkfss",
};