fix ParamDefaults bug

Hi guys,

We were having some issues with Parameter Defaults...we had a case where the default color table was being respected, but not default color table *range*.

Anyway, I tracked this down to an issue in `ParamDefaultsEditor.getParamInfo`...there's a simple issue with lower-case'd strings not matching up with strings in the `paramInfos` list.  So to fix our problem I just add another search with the non-lower-case'd string.

This should fix [McIDAS-V inquiry 1371](http://mcidas.ssec.wisc.edu/inquiry-v/index.php?inquiry=1371) 
[1371]