Bug 1890371: Upgrade: JSColor 2.0.5 to 2.3.3

 - replaced exsiting jscolor.js with jscolor.js file from here:
  https://jscolor.com/release/2.3/jscolor-2.3.3/jscolor.js


 - small code tweaks in color.php to target element

Change-Id: I9bd88c7ecf665af336b9144dbfba81997c443483
Signed-off-by: Lisa Seeto <lisaseeto@catalyst.net.nz>