So, in testing out ExtJS4, here's something not obvious to me.
Using this demo as guidance, I'm assuming that when I insert a grid and a paging bar into a page, via bbar or via dockedItems, the framework picks up the buttons from somewhere.
Given that I don't see some sort of declaration of a global image path or anything of the sort, where does ExtJS4 go to get button images? The css doesn't seem to have any paths. The paging.js doesn't too. Where is this defined? Are there default paths built into the widgets? What if I want to override it at a global level? What is the filename even supposed to be?