Right now if two query widgets are included in a template, only the first one's
parameters (template url etc.) are considered because the info is stored in a
single Javascript call written by the Query widget.

Perhaps this could be changed so that the parameters are passed to the
Javascript function by the button, thus allowing multiple Query templates on page. 

I started to look into this, but I'll have to come back to it when I have more
time, unless someone beats me to it.