Nawqaan 232

Fixed buggy behavior in reacting to user input. When a user changes the constituent, the links on the site identification popup should now create the correct type of graph popup. When a user changes the constituent, the graph popup, if any should change to the correct constituent for the same site.

Also introduced new bugs -ahem- features; we can buggily plot the correct site-specific annual load for a given constituent in the mrb plot popup window.