Reduce error message spam on import

name: 🚀 Feature Request

Is your feature request related to a problem? Please describe

When importing skills (via json), a missing subskill can cause a tsunami of error notifications. This is not user friendly (the user does not care about each failed edge conversion etc.).

Describe the solution you'd like

Bundle the feedback (successes and errors) for the whole import into one notification.

Additional context

Click Me -/-