Space keys are not converted into references with the correct case

This should be exceedingly rare, but if a space is referenced by its key in a macro parameter but without the canonical case, it will be converted using the case used in the reference, not the correct one.

For instance, if a page in the "MySpace" space contains the following:

<p><ac:structured-macro ac:name="livesearch">
  <ac:parameter ac:name="spaceKey"><ri:space ri:space-key="myspace" /></ac:parameter>
</ac:structured-macro></p>

it will be converted to:

{{locationSearch reference="myspace"/}} 

instead of:

{{locationSearch reference="MySpace"/}}