Builds the mobile toolbar's DOM skeleton, without wiring any behaviour.
Structure only: the buttons exist but do nothing until the state module binds them. The
split is what lets the toolbar be rebuilt on a layout change without re-registering
listeners.
Builds the mobile toolbar's DOM skeleton, without wiring any behaviour.
Structure only: the buttons exist but do nothing until the state module binds them. The split is what lets the toolbar be rebuilt on a layout change without re-registering listeners.