Have descendant dropdown/menu icons destroyed instead of reparented

[1ForeverHD]

• [ ] Replace with the following code:

function Icon:destroy()
    if self._destroyed then return end
    IconController.iconRemoved:Fire(self)
    self:clearNotices()
    if self._parentIcon then
        self:leave()
    end
    local function destroyDescendantIcons(parentIconToCheck)
        local storageNames = {"dropdownIcons", "menuIcons"}
        for _, storageName in pairs(storageNames) do
            for _, childIcon in pairs(parentIconToCheck[storageName]) do
                destroyDescendantIcons(childIcon)
                childIcon:destroy()
            end
        end
    end
    destroyDescendantIcons(self)
    self._destroyed = true
    self._maid:clean()
end

• [ ] Also fix this bug when resetOnSpawn false and destroying dropdown: