Allow a wxPanel to be placed directly in a wxFrame

[MichaelNZ85]

The way that wxFormBuilder currently works (Frame > Sizer > Panel) is not in line with the way the wxWidgets samples are laid out and it seems that most wxWidgets devs do not lay out their apps this way. It is not necessary for a Frame to have a Sizer because the only immediate child of a wxFrame will always be resized to fill the frame's whole client area.

Could you please make wxFormBuilder allow a panel to be directly placed in a wxFrame?

[sodevel]

According to the wxWidgets documentation, this is a special case only for toplevel elements. wxFB is strongly sizer based and i'm afraid with the current data model it is not possible to realize that without introducing weird side effects. I'm afraid a proper implementation would be quite time consuming, time i don't have available.