addons: object select_get syntax update

add_advanced_objects_menu/make_struts.py

add_mesh_extra_objects/add_mesh_beam_builder.py

add_mesh_extra_objects/add_mesh_triangles.py

btrace/bTrace.py

io_export_unreal_psk_psa.py

measureit/measureit_geometry.py

object_fracture/fracture_ops.py

object_fracture/fracture_setup.py

space_view3d_display_tools/select_tools.py

ui_layer_manager.py