map: restore scale and position when shown

Set the scale to previous or 0.85 because the game default
scripts set it to fullscreen scale each time. Additionaly,
as the hook is now in place, it is no longer required to
manually run the default functions when the map gets shown.

modules/map.lua

@@ -48,16 +48,12 @@ pfUI:RegisterModule("map", "vanilla:tbc", function ()
       this.hooked = true
 
       HookScript(WorldMapFrame, "OnShow", function()
-        -- default events
-        UpdateMicroButtons()
-        PlaySound("igQuestLogOpen")
-        CloseDropDownMenus()
-        SetMapToCurrentZone()
-        WorldMapFrame_PingPlayerPosition()
-
         -- customize
         this:EnableKeyboard(false)
         this:EnableMouseWheel(1)
+
+        -- set back to default scale
+        WorldMapFrame:SetScale(scale or .85)
       end)
 
       HookScript(WorldMapFrame, "OnMouseWheel", function()