Revert "[2/2] OmniSwitch: fix OmniSwitch recents integration for multi-user"

This reverts commit 93c09065ee19f4f45258f0a849af813450886a04.
Revert "OmniSwitch: simplify and cleanup"

This reverts commit f06ab492b4b39939a6d42a5fb058bc02218d0aa1.
Revert "[3/3] OmniSwitch: omniswitch as default recents"

This reverts commit 2565211b46cc7af1008d09a26d7f4fad2dac8a7a.