Combine all thumbnail shadow variables into one, and add note to doc comment that the value must be rgb or rgba
Combine all thumbnail shadow variables into one, and add note to doc comment that the value must be rgb or rgba

zurb/foundation-emails,Stadly/foundation-emails,zurb/ink,jsit/foundation-emails,jsit/foundation-emails,struankl/foundation-emails,struankl/foundation-emails,jsit/foundation-emails,zurb/foundation-emails,Smartmessages/foundation-emails,zurb/ink,zurb/foundation-emails,zurb/foundation-emails,Stadly/foundation-emails,jsit/foundation-emails,struankl/foundation-emails,Stadly/foundation-emails,Smartmessages/foundation-emails,Stadly/foundation-emails,struankl/foundation-emails