the fact is, making additions to power store is not supported.
That does not mean i will not offer assistance to add something if I can. it means if it does not work, we cannot fix it.
the issue is that your toolbar uses jquery which is conflicting with the mootools functions in power store.
I cannot say if the toolbar that neilo suggested will work with power store or not.
we have not tested power store with any of these toolbars.
you can certainly try to add it, but at the end of the day, Power Store does what it does out of the box. trying to add other functionality to it is not supported.