Don't shadow when no shadowLevel is defined
Don't shadow when no shadowLevel is defined

Now you always need to define the shadowLevel explicitly.

tleunen/react-mdl,joshq00/react-mdl,joshq00/react-mdl,timkrins/react-mdl,Graf009/react-mdl,timkrins/react-mdl,Graf009/react-mdl,tleunen/react-mdl,joshq00/react-mdl