PWD: As an end-user, I want the application to feel and behave as an ordinary "desktop operating system GUI"

The PWD-application should behave and feel like a graphical user-interface on an ordinary operating system.

• Sub-apps should be opened by an icon in a dock. #3
• Sub-apps should be draggable, get focus and be closeable #4
• Many instances of Sub-apps should be able to run at the same time #5
• The PWD should be a Single Page Application #6