No, Prop 47 didn't de-criminalize misdemeanors
"The idea behind Proposition 47, which passed by a wide margin in 2014, was to reduce certain non-violent, non-serious felonies to misdemeanors in order to ensure that the resources of the criminal justice system are more wisely allocated, and that prison and jail beds are reserved for the offenders who are the greatest risks to cause harm if they are left at liberty."
LA Times
July 18, 2018