message: Set filter_select_enabled default to True for Druid
diff: @@ -456,6 +456,7 @@ class DruidDatasource(Model, BaseDatasource):
  # Columns
  datasource_name = Column(String(255))
  is_hidden = Column(Boolean, default=False)
  + filter_select_enabled = Column(Boolean, default=True) # override default
  fetch_values_from = Column(String(100))
  cluster_name = Column(
  String(250), ForeignKey('clusters.cluster_name'))
  