Create separate component for PendingChangesNotification

[TannerGilbert]

Currently, both the ktb-modify-uniform-subscription and the ktb-project-settings component use a dt-confirmation-dialog do display the pending changes warning. As the pending changes warning might be implemented in additional views in the near future it should be extracted into its own component.

Acceptance Criteria

• [ ] Pending Changes Notification has its own component
• [ ] Component gets template from parent to achieve different behaviour

DoD

• [ ] Unit tests

Current usage

Project Settings:

Uniform Integrations: