JS: re-initialize the 'Achieved Speed Multiplier' display when the JaamSimModel is changed
JS: re-initialize the 'Achieved Speed Multiplier' display when the JaamSimModel is changed

Signed-off-by: Harry King <409587b9e6671aa0763646191d292852dc49a658@gmail.com>

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