Revert "[2/3] Settings: Battery Saver mode"

This reverts commit c64387e5fc5d41ac4012d627c4d83b81ad107d67.
Revert "Revert "[3/3] TeloRadio""

This reverts commit f749912014f489685d1578e2fcd8bc1ad115b3f3.
Revert "Revert "TeloRadio: optimizations""

This reverts commit 832a7e3c8a2e2d726ff93b777804eeab0bd7df28.