A controversy is growing over a medical marijuana dispensary that wants to do business in East Sacramento. There's mixed reaction, but not everyone is happy a medical pot shop may be operating out of a storefront and attached house at 3257 Folsom Blvd. There's disagreement over whether the dispensary has opened shop yet. Questions arose after representatives of the dispensary and the landlord notified some neighbors the building's lease had been taken over by the dispensary and the storefront's windows were tinted black in late December, then retinted darker in January. The space has been vacant since a charitable thrift store, This 'n' That Thrift & Gift, left in early September. Half