Right click context menu for selling/buying items from vendors

[3vcloud]

atm the context menu shown when right clicking an item in the vendor window is the same as if you right click it in your own inventory. See if we can find out whether the hovered item is in the vendor window by tracing the hover frame back to its owner.

If the item is being hovered via the vendor window, show the option to bulk sell or bulk buy - this should then follow the logic as if you ctrl + clicked the "request quote" button i.e. it prompts you for the amount