core/menusystem: fix namespacing errors

sonic-boost.love/core/modules/menusystem/flowbox.lua

@@ -1,7 +1,7 @@
 local cwd  = (...):gsub('%.flowbox$', '') .. "."
 local Menu = require(cwd .. "parent")
 
-FlowBox = Menu:extend()
+local FlowBox = Menu:extend()
 
 local menuutils = require(cwd .. "widgets.utils")
 
@@ -9,7 +9,7 @@ function FlowBox:new(menusystem, name, x, y, w, h, slots_hor, slots_vert)
   self.slots = slots_hor * slots_vert
   self.slots_hor = slots_hor
   self.slots_vert = slots_vert
-    ListBox.super.new(self, menusystem, name, x, y, w, h)
+  FlowBox.super.new(self, menusystem, name, x, y, w, h)
   self.begin = 1
   self.widget.h = math.floor( self.h / slots_vert )
   self.widget.w = math.floor( self.w / slots_hor )

sonic-boost.love/core/modules/menusystem/grid.lua

@@ -1,8 +1,7 @@
 local cwd  = (...):gsub('%.grid$', '') .. "."
 local Menu = require(cwd .. "parent")
 
-
-GridBox = Menu:extend()
+local GridBox = Menu:extend()
 
 function GridBox:new(menusystem, name, x, y, w, h, slots_hor, slots_vert)
   self.slots = slots_hor * slots_vert

sonic-boost.love/core/modules/menusystem/listbox.lua

@@ -3,7 +3,7 @@ local Menu = require(cwd .. "parent")
 
 local menuutils = require(cwd .. "widgets.utils")
 
-ListBox = Menu:extend()
+local ListBox = Menu:extend()
 
 function ListBox:new(menusystem, name, x, y, w, h, slots)
   self.slots = slots