Fix drawable position calculation

The position of the drawable wasn't taken into account.

This does not fix the bug reported by Minde where the manu
position is correct the first time, but off the second, this is
due to something else.

init.lua

@@ -6,9 +6,9 @@ local aw_button = require( "awful.button"      )
 local beautiful = require( "beautiful"         )
 
 -- Define some wibox.widget extensions
-local function set_tooltip(self, text)
+local function set_tooltip(self, text, args)
   if not text then return end
-  self._tooltip = tooltip(self,text)
+  self._tooltip = tooltip(self,text, args)
 end
 
 local function set_menu(self,menu,button)
@@ -25,7 +25,18 @@ local function set_menu(self,menu,button)
       m = menu(self)
     end
     if not m then return end
-    m.parent_geometry = geo
+
+    local dgeo = geo.drawable.drawable:geometry()
+    -- The geometry is a mix of the drawable and widget one
+    local geo2 = {
+      x        = dgeo.x + geo.x,
+      y        = dgeo.y + geo.y,
+      width    = geo.width     ,
+      height   = geo.height    ,
+      drawable = geo.drawable  ,
+    }
+
+    m.parent_geometry = geo2
     m.visible = not m.visible
   end)
   for k, v in pairs(bt) do