Merge live inventory counts (2.3.0)

• Stash tooltip counts are now live - moving an item updates the count on the next hover instead of needing a menu switch. Previously the count read a cached snapshot.
• Added an "ON YOU" tooltip line showing how many of an item you're carrying (equipment/pockets/secure container). Shown only when you have one or more on you; otherwise the tooltip is unchanged.
• Known limitation: in-raid, already-displayed checkmarks/counts don't refresh until you reopen the inventory (the newly looted item shows the right count, existing ones update on reopen). Out of raid is unaffected.