Pygubu

* Fix for issues alejandroautalan/pygubu-designer154, alejandroautalan/pygubu-designer155
* Update zh_CN translations alejandroautalan/pygubu-designer158 (larryw3i).

* Hotfix, reset code tab on load file.

* Allow to setup values for option database after first window created. refs alejandroautalan/pygubu282
* Fix for widget highlighter offsets in preview, refs alejandroautalan/pygubu-designer203

* Editabletreeview: Hide editors when user clicks inside treeview area
with no rows. This generates \<\<TreeviewEditorsUnfocused\>\> event. refs alejandroautalan/pygubu279
* Editabletreeview: Add method get_value(col, item) to quicky
access tree data. refs alejandroautalan/pygubu279
* Fix error on ttkwidgets plugin (autocomplete widgets)
* Add support to customtkinter 5.
Customtkinter changed a lot from 4.6 to 5.
The plugin will support only the latest version.

* Hotfix: Fix template path in preferences window alejandroautalan/pygubu-designer147 (jrezai)

* Fixes for PathChooserInput. refs alejandroautalan/pygubu278, alejandroautalan/pygubu-designer145
* Fixes for ToplevelPreviewBaseBO (for plugins)