JS: suppress unprintable characters generated with Cntrl pressed
JS: suppress unprintable characters generated with Cntrl pressed

Signed-off-by: Harry King <4297d713059dfdc9fd310cd85bf547ea21a2d624@ausenco.com>
Signed-off-by: Geoffrey Savinkoff <68a1749264702001368349bd5dce5335e81284ad@ausenco.com>

jaamsim/jaamsim,jaamsim/jaamsim,jaamsim/jaamsim,jaamsim/jaamsim