chore: port menu to rect

birb/modules/menusystem/parent.lua

@@ -21,7 +21,9 @@
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ]]
 
-local Menu = Object:extend()
+local Rect = require "birb.objects.2D.rect"
+
+local Menu = Rect:extend()
 
 local function updateWidgetByOrder(a, b)
   if a.order ~= b.order then
@@ -38,10 +40,7 @@ function Menu:new(menusystem, name, x, y, w, h)
   self.menusystem = menusystem
   self.name       = name
 
-  self.x = x
-  self.y = y
-  self.w = w
-  self.h = h
+  Menu.super.new(self, x, y, w, h)
 
   self.widget = {}
   self.widget.list              = {}
@@ -137,10 +136,7 @@ function Menu:clear()
 end
 
 function Menu:resize(x,y,w,h)
-  self.x = x
-  self.y = y
-  self.w = w
-  self.h = h
+  self:set(x,y,w,h)
 
   self:updateWidgetSize()
 end