callbackKey issue in annotator Visualizer

[anindex]

Description
The issue happens when user presses keys other than LEFT and RIGHT. In other words, when user try to press switch mode by key 1 or 2 on the cloud visualizer of any annotator, then the callbackKey keeps callback with value key = -1 (see image below).

[bbferka]

@Sanic could this be related to what you were experiencing and fixing in #191 ?

[Sanic]

@bbferka Yep, i would think so.
Oh, wait a sec. This issue is about the Cloud Visualizer window right? My changes only touched the 2d image keyhandler