Example: Todo app Error  - UPDATE all examples error out. 
Nim Version = 1.6.6 Stable


**Error:** Undeclared field: 'has_margine'

When running example todo.nim 

`nim c -r todo.nim 
`Hint: used config file '/home/nixfreak/.choosenim/toolchains/nim-#devel/config/nim.cfg' [Conf]
Hint: used config file '/home/nixfreak/.choosenim/toolchains/nim-#devel/config/config.nims' [Conf]
...............................................................................................
/home/nixfreak/.nimble/pkgs/owlkettle-1.3.0/owlkettle/widgetdef.nim(510, 6) Hint: 'gen_docs' is declared but not used [XDeclaredButNotUsed]
.......
/home/nixfreak/.nimble/pkgs/owlkettle-1.3.0/owlkettle.nim(35, 24) Hint: conversion from WidgetState to itself is pointless [ConvFromXtoItselfNotNeeded]
/home/nixfreak/.nimble/pkgs/owlkettle-1.3.0/owlkettle.nim(68, 7) Hint: 'status' is declared but not used [XDeclaredButNotUsed]
/home/nixfreak/nim/gui/owlkettle/examples/todo.nim(35, 12) template/generic instantiation of `gui` from here
/home/nixfreak/.nimble/pkgs/owlkettle-1.3.0/owlkettle/guidsl.nim(197, 22) Error: undeclared field: 'has_margin' for type widgets.Box [type declared in /home/nixfreak/.nimble/pkgs/owlkettle-1.3.0/owlkettle/widgetdef.nim(243, 10)]

UPDATE:: All examples have giving the same error.
