Improve design after partial port to Kirigami
- HistoryPage: Make use of the Kirigami primary action button
- increase height of the tab bar to be more similar to how it used to look
- Don't display the application header and tab bar in a call
- Restore proper icons in tab bar
- Use Kirigami.ScrollablePage and its header property for proper margins and scrolling behaviour
Edited by Jonah Brüchert