Revert "navigation bar: custom height"

This reverts commit daea52ac436aed10d8f7fb967993785768f4b9f9.
Revert "volume rocker: make safe headset volume user configurable"

This reverts commit fbb4c9f90f96c0feaa87a407ace42cbeb11ef73d.
Revert "status bar: quick settings pulldown, use a simple list summary"

This reverts commit cb2dffd805b41d74f91d5fdbd92a18da66c736e1.