Contact Diary - Onboarding/Overview polishing (EXPOSUREAPP-4152) (#1913)

* Changed styling of nested list item in overview screen

* Added visual feedback when pressing the privacy information button on the overview screen

* Removed unnecessary menu class, Moved menu handling into fragment

* Changed icons in nested items in overview screen

* Revert "Removed unnecessary menu class, Moved menu handling into fragment"

This reverts commit 885e9e8ab13fbc695987b838827840c5e8197f14.

* Added darkmode support for overview sceen items

* Linting

* Aligned naming conventions

* added new line for kolya

Co-authored-by: I502720 <axel.herbstreith@sap.com>