Ensure that AppBanner hides subtitle label
Ensure that AppBanner hides subtitle label

Make sure that the AppBanner does not show a subtitle label when the property
is set to do so.

[endlessm/eos-sdk#4125]

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib