[8u60] request for review: RT-40644: [Mac]: The "Custom colors ..." dialog can not show as expected

[Morris Meyer]

Jonathan and Leif,

Please review the css changes for Caspian and Modena for the color 
picker custom color chooser.  We need a bit more than 1em for 
"settings-unit" in CustomColorDialog.java when running on Mac 10.10.  
Tested on 10.10.4.

Thanks much.

        --morris

JIRA - https://javafx-jira.kenai.com/browse/RT-40644
WEBREV - http://cr.openjdk.java.net/~morris/RT-40644.01/