[Kanegasi]

Go to https://addon.bool.no, name this whatever you want in the top box, and then paste the following code in the big box.

Download and extract this into Interface\AddOns like any other addon.

local frame=CreateFrame("frame")
frame:RegisterEvent("PLAYER_LOGIN")
frame:SetScript("OnEvent",function()
    for bag=1,99 do
        if _G["ContainerFrame"..bag] then
            for i=1,99 do
                local bagitem=_G["ContainerFrame"..bag.."Item"..i]
                if bagitem and bagitem.IconQuestTexture then
                    hooksecurefunc(bagitem.IconQuestTexture,"Show",function(s)s:Hide()end)
                else
                    break
                end
            end
        else
            break
        end
    end
    for i=1,999 do
        local bankitem=_G["BankFrameItem"..i]
        if bankitem and bankitem.IconQuestTexture then
            hooksecurefunc(bankitem.IconQuestTexture,"Show",function(s)s:Hide()end)
        else
            break
        end
    end
    for i=1,999 do
        local reagentitem=_G["ReagentBankFrameItem"..i]
        if reagentitem and reagentitem.IconQuestTexture then
            hooksecurefunc(reagentitem.IconQuestTexture,"Show",function(s)s:Hide()end)
        else
            break
        end
    end
end)