Revert "[FEATURE] Speed-up Backend with CardLayout"

This reverts the use of CardLayout for the Backend.
Following commits have been squashed:

- 9ec94db2
- 5ec3779c
- 873f1dfe
- a408234c
- 120d38d1

Change-Id: I2287b18598dbc5fe546c5ddc9aa9980d9b6a3b97
Resolves: #30645
Reviewed-on: http://review.typo3.org/5630
Reviewed-by: Steffen Gebert
Tested-by: Steffen Gebert
Reviewed-by: Tolleiv Nietsch
Tested-by: Tolleiv Nietsch
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers