fixiing bad default value for background color of card header, content and footer#1838

Merged

jgthms merged 1 commit intojgthms:masterfrom

doc75:card-background2

May 1, 2018

Commits on Apr 28, 2018

fixiing bad default value for background color of card header, content and footer. Previously was none, now it is transparent (default CSS value)
doc75
committed