Trebuchet: add toggle for desktop and drawer labels

Squashed with:

Author: razorloves <razorloves@gmail.com>
Date:   Wed Jan 8 23:53:25 2020 -0600

    Trebuchet: Fix missing icon labels in folders

    Fixes regression introduced in 186796eb.

    Change-Id: I1e6054fe84ea54bf2a85bf6d26760196ffe78f69

Change-Id: I98063b7adaf22029c4bfa50d2cac730f3612e121
Signed-off-by: Joey <joey@lineageos.org>