Run the Turtle WoW setup with RunNextFrame and hook the map once

The one-shot OnUpdate frame becomes RunNextFrame. Its call into the map loader ran with the delay frame as this, so the loader's hooked flag sat on a different frame than on PLAYER_ENTERING_WORLD and the map hooks went on twice: shift and ctrl mouse wheel changed alpha and scale by two steps. The flag is now a local of the module.

modules/turtle-wow.lua

@@ -78,10 +78,7 @@ pfUI:RegisterModule("turtle-wow", function ()
     end)
   end
 
-  local delay = CreateFrame("Frame")
-  delay:SetScript("OnUpdate", function()
-    this:Hide()
-
+  RunNextFrame(function()
     -- correct positions of new game menu layout
     if GameMenuButtonShop and (GameMenuButtonPFUI or GameMenuButtonPFUIAddOns) then
       -- calculate new offset for the shop button