This is the suggestion for the top right dialog:
- View Scale should ideally be text but on mouse over becomes a slider
- Reset View
- Save All (Quine)
- Delete All
- Copy Current Layout should put layout into Clipboard
- Upload Layout should upload from Clipboard
- Connect to Graph should open, as below
Suggestion for menu on Mouse over:
When clicking Connect to Graph the dialog should fold open and display seeds and also a dialog for adding a URL manually. I suggest rectangular icons for the seeds since that conveys more drag-than lozenge: