Fixes for case-sensitivity issues with COS mashup

This pull request fixes issues with some case-sensitivity problems with the mashup.  The tagMapping should have been all in lowercase, but this was not relayed to the user.  By using the cased state, such as `In Progress`, the mashup wouldn't work.  Making this `in progress` works.  This pull request adds code to make all keys in the tagMapping collection lower-case, consistent with the casing done on line 78.

As an added bonus: this also corrects some inconsistencies with the indentations.  The mashup will now look prettier and properly indented within the mashup manager's editor.