Resolve "Select maps for elections"

Closes #76 (closed)

internal/models/election.go

@@ -104,6 +104,8 @@ func (d *DataHandler) putElection(w http.ResponseWriter, r *http.Request, id int
 	}
 	o.Name = election.Name
 	o.BallotType = election.BallotType
+	o.MapAreaFile = election.MapAreaFile
+	o.MapSectionFile = election.MapSectionFile
 	d.db.Save(&o)
 	json.NewEncoder(w).Encode(o)