Fixed issue with new 2.3.5 admin-template

Fixed issue with new ProcessWire 2.3.5 admin-template where the Color Swatches where not clickable anymore.

See discussions and solution here (might also work for other modules and the new admin-template)

http://processwire.com/talk/topic/4650-new-processwire-admin-theme-on-dev-branch/?p=46380

http://processwire.com/talk/topic/865-fieldtype-colorpicker/?p=46948