Fix issue with heatmap showing black tiles#20753

Merged

markov00 merged 4 commits intoelastic:masterfrom guanghaofan:issue/20544

Aug 30, 2018

+14-3

Commits on Jul 24, 2018

Heatmap metric data points should only be quantized while the data full range is grate than the maxmum allowed color count
ghfan
committed
The data cell with metric value 'null' should always be hidden in the heatmap
ghfan
committed
Add one variable for max color count and follow the coding style
ghfan
committed

Commits on Aug 30, 2018

Merge branch 'master' into issue/20544
markov00
committed