[bsmorgan]

I modified it a little bit. Since Skillet has 3 sub-categories and as written, it always puts the main category at the bottom. I added an offset value so that once expanded, Skillet and its sub-categories were always on the screen.

local function ScrollToCategory(panelName,offset)
    local idx = 0
    InterfaceOptionsFrameAddOnsListScrollBar:SetValue(0)
    for i,cat in ipairs(INTERFACEOPTIONS_ADDONCATEGORIES) do 
        if not cat.hidden then 
            idx = idx + 1
            if cat.name == panelName then
                break
            end
        end
    end
    local numbuttons = #(InterfaceOptionsFrameAddOns.buttons)
    if idx and numbuttons and idx > numbuttons then
        local btnHeight = InterfaceOptionsFrameAddOns.buttons[1]:GetHeight()
        InterfaceOptionsFrameAddOnsListScrollBar:SetValue((offset+idx-numbuttons)*btnHeight)
    end
end

I guess the code should worry about setting a value that exceeds the maximum.