Restore previous state when failing to change video verification state

When video verification can not be enabled or disabled the previous
state is set again in the JavaScript share object. This ensures that the
UI will not reflect a misleading state.

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Signed-off-by: npmbuildbot[bot] <npmbuildbot[bot]@users.noreply.github.com>