Add graph overlays, refactor graph, misc refactoring, bug fixes

[intpix]

Added overlays to the graph panel and other refactoring.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[xiaoyongaz]

looks good, will setup a new one

[intpix]

@xiaoyongaz are you referring to redeploying to test?