Add new layout

Hi everyone,

I would like to add a fourth window in the central widget for my QT widget. I already added it in the master___split_ in the _main_windows and now I want to add it in the layout preferences to give it a disposition.

I have search in ui/qt/layout_preferences_frame and in epan/prefs how layout___type_5 gives the description of windows module disposition but I didn't find the solution