Adding icons to Accordian Tab

Hi I have an accordian tab in which i dispaly a table of measurements. I want to add an icon to accordian tab at the right side of the Tab along with usual icon for accordian tab. i need to open a form on click of that icon which accepts new measurements.
How this can be achieved. The method for adding tabs does not provide any facility for this.

accordion.addTab(measurementsTable, “Mittaukset”
, icon1);

That is probably rather hard to accomplish. If you need an extra button only in the currently open Accordion tab, you might be able to do that with the
Overlays
add-on using negative offset from the tab content area. Having such a button also in closed tabs would probably be really tricky if at all possible.

The less hacky approach is to make a custom widget that extends Accordion. It would probably be relatively easy to implement.