* Switch to GraphNG for Logs Histogram
* Remove redundant timeZone
It was used just to format timestamp in the tooltip but it's not needed anymore.
* Add tests for creating logs histogram data
* Update decoractors tests
* Adjust bar width to be more like in the old graph
* Fix tooltip pointer color
* Test tooltip pointer color
* Decouple graph config from uPlot internals
* Ensure nested properties are not mutated when overrides are applied
* Add legend toggling for Explore graphs
* Remove unused component
ExploreGraphNGPanel is now used in Explore
* Code formatting
* allow multiple bars pathBuilders to be globally cached with different settings
Co-authored-by: Leon Sorokin <leeoniya@gmail.com>