IGAPP-909: Implement transparent header for modals

[jira-to-github-migrator-test[bot]]

Andreas Fischer - 1.2.2022, 11:04:24

As a user i want to have a transparent header for modals

Note: At the moment the transparent header is not transparent

Acceptance Criteria

• Create a separate stack group for transparent header
• Add the particular stack screens to the group
• Rename the current transparent header (f.e. imprint shouldn't be transparent?)
• Hide header if there is no stack to goBack()

Environment: - Linked issues:

[jira-to-github-migrator-test[bot]]

sarahsporck - 16.3.2022, 14:39:16

There are probably no use cases for this in integreat.