* Initial cut of labeler visualizers
* Added event system to the scene so that the UI would work
* Created a shader that can remove the background of the segmentation image
* Changed package for the shader
* Now with sliders in UI for transparency values
* Heads up display information now available
* PR fixes
Some fairly major UI architecture changes to address comments made during the initial cut PR. Things make more sense now.
* Fixes so that rendering is not a frame behind
* Graceful-ish handling of more than 1 perception camera for visualization
* Removal of expired visualization artifacts fixes for SynthDet
Removed bounding boxes and HUD entries for objects no longer being visualized, added performance improvements to handle complete scene changes every frame
* Fixes for scroll bars on HUD and UI Controls on top of UI objects
* Object pooling for HUD entries
* Adding tests for visualization in...