Lock visible change event while startup.
Comments / serialize column width
Fix menue creation
Change menu "new" position to File menu.
Menu insertion and sorting need to be overworked soon.
Add ThreadWorker and example.

Btw menu lost its File/Quit entry due to rebuild. As already mentioned, menu creating and order need to be overworked.
Add InsertMenu() possibility.

Add at first File/Quit menu before add variable component menues (sorting not yet implemented)
Add Quit accelerator key.

Some refacturing.