[Randactyl]

Made this real quick to use all of my hundreds of fish items. There aren't really any safety checks, so it needs to be used responsibly (use it on fish!)

local function AddContextMenuOption(rowControl)
    local bagId = rowControl.bagId
    local slotIndex = rowControl.slotIndex
 
    AddMenuItem("Use All", function()
            local delay = 0
            for i = 1, rowControl.stackCount do
                zo_callLater(function() CallSecureProtected("UseItem", bagId, slotIndex) end, delay)
                delay = delay + 2000
            end
        end, MENU_ADD_OPTION_LABEL)
 
    ShowMenu(self)
end
 
local function AddContextMenuOptionSoon(rowControl)
    zo_callLater(function() AddContextMenuOption(rowControl) end, 50)
end
 
ZO_PreHook("ZO_InventorySlot_ShowContextMenu", AddContextMenuOptionSoon)

If anyone wants to make something of this, go for it.

edit: one nice change would be disabling the "Fish acquired." center screen announcement!