Pygubu

* Added ttk.OptionMenu and ttk.LabeledScale
(alejandroautalan/pygubu-designer178)
* Fixed issues when working with Notebook tabs.
* Restrict customtkinter plugin to customtkinter < 5
(next version will only support customtkinter >= 5)

* Builder object, REMOVED configure_for_preview method.
* Added support for: customtkinter, tkintermapview

* Fix for issues alejandroautalan/pygubu-designer154, alejandroautalan/pygubu-designer155

* Hotfix for alejandroautalan/pygubu-designer153

* Allow pygubu to use importlib.resources module. refs alejandroautalan/pygubu269
* Code generation: Fix callback registration arguments.
* Builder object, new static method configure_for_preview.

* Fix Menubutton code generation. refs alejandroautalan/pygubu-designer151
* Fix pyinstaller hook for python 3.8 refs alejandroautalan/pygubu270