fix: add scrollbar for big diagrams (#4120)
fix: add scrollbar for big diagrams (#4120)

In case of large DrawIO diagrams, today it is sometimes impossible to display it totally on the screen.
This quick workaround provides a way to enable a scrollbar if the width of the diagram is higher than the browser/screen width.
Requarks/wiki,Requarks/wiki,Requarks/wiki,Requarks/wiki