Replaced all references to Smalltalk by instvar `environment` in new system browser.
/* XPM */
static char * stepIn [] = {
/* width height ncolors cpp [x_hot y_hot] */
"24 18 3 1 0 0",
/* colors */
". m none c none",
"* m black c black",
"R m black c red",
/* pixels */
"........................" };
"..RRRRRRRRRRRR..........",
"..RRRRRRRRRRRR..........",
"..RR........RR..........",
"..RR........RR..........",
"..RR..****..RR..****....",
"..RR..****..RR..****....",
"..RR..**....RR....**....",
"..RR..**..RRRRRR..**....",
"..RR..**...RRRR...**....",
"..RR..**....RR....**....",
"..RR..**..........**....",
"......**..........**....",
"......**..........**....",
"......**..........**....",
"......****......****....",
"......****......****....",
"........................" };