[PX] +: create new public function getStoreCategoryId()

This functinon retries the required store id from the Project-X config
[PX] +: optimize listpage template & improve js script

I was able to use the existing classnames in the store_list template. Therefor the wrapper classname are no longer necessary. This also enhances the flexibility for implementation on other pages or projects.
I also found some flaws in the js script causing the interactions to malfunction. I was able to fix a few things but not everything yet.
Missing part is collaps the expanded tab when other tab is clicked.
[PX] +: load all required store info in store_list.phtml

By using magic methods it becomes very easy to obtain the required product attribute data.
I've used print_r($_store->debug()) to get all the prodcut related data. this makes it easy to find the attribute names but is also a check to verify if all data is present