Log message when tooltip coordinates unavailable
Log message when tooltip coordinates unavailable

In order to make errors more obvious, we should log a message to the
console when we fail to get tooltip coordinates over DBus.

[endlessm/eos-sdk#3819]

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