EUCA-7759
After spending some time in the debugger, I finally found that the tag editor calling its own render() function when 'addTag' is heard has consequences for the wizard view... it appears to squash the button event, and so required another click. The right thing to do would be to change the tag editor scope to a model, making all those internal render calls unnecessary. But doing so could affect lots of things and come with its own set of unintended consequences, so for now I've just added a short delay to the name change listener, to give the wizard a chance to turn the page and render before the tag editor does its thing.
Merge pull request #194 from eucalyptus/EUCA-7759

EUCA-7759 - Solves required two click problem when instance name(s) are added and next button is clicked straight away.