How to create a drop-down button which will display all dashboard names in a drop-down and on clicking on it, display the respective dashboard. Also, is it possible to merge multiple dashboards to single a dashboard? How?
As far as merging panels, it is a trivial matter of selecting "Edit Source" on your dashboard and copying the XML for the portions you like and pasting that inside another dashboard (again, after clicking "Edit Source"). It is that easy. Then update your default navigation view to include this new dashboard.