Create custom popup style and animation similar like Bisq1 notifications

[HenrikJannsen]

For giving feedback to certain user activities an in-app notification overlay would be good. E.g. if user has set to not open links in browser but to copy, they might later be wondering why nothing happens when they click a link. We should show a short living graphical feedback. Could be similar style and animation like in Bisq 1 the in-app notifications.