Call it Douglas High School version 3.0.Douglas High's Class of 2019 will be the first collection of students to start and end their high school careers in the same place since rapid growth forced their predecessors to decamp for the middle schools in 1994.That was the result of a plan to reduce the cost of expanding Douglas High School, or heaven forbid building a new high school, and was concocted by a citizens committee in 1992.After getting a bond passed and building Pau-Wa-Lu Middle School, along with two new elementary schools, that committee saw its work succeed until the increase …