JD3D: replaced speedUpLabel with a spinner
JD3D: replaced speedUpLabel with a spinner

The spinner and the slider both are representing the real time for
simulation and have one common change listener to update the other when one
of them is changed.

Arrow up button on the spinner multiplies the value by 2. The down arrow
divides the value by 2.

Signed-off-by: Ali Marandi <c1f5ba98b5f658269cb60d2683b8b1af37717b03@ausencosandwell.com>
Signed-off-by: Harvey Harrison <eadbd6b462bf3c97df0300a934c12bc2e5d1fe51@ausencosandwell.com>

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