sort the project to have the sources in a src directory
reorganize the src directory and the project file classes
split a too big main file to files with each class
complete the split of the FacadeManager
continue with documentation diagrams
avoid instances of main window to subscribe signals between them, those signals will pass by the main window object and it does what's required (simplifies maintenance).
extend parsing process signalling to more than progress bar management.
Improve instances builders and signals append into them.