Result list. Add icon for KB items

Purpose: We have implemented icon in the Result List indicating if an Item comes from a Local resource (=Inventory), but we still have a grey box/icon for KB resources.

Please note, for Local resources we use the Inventory icon, so probably similar solution for now, using the eHoldings app icon for KB resources.

Later, when we implement multiple Locals, and multiple KBs we'll need filipjakobsen/Kimie's UX guidelines for, how the icons would be.