Resolve "Multicolored anchors"

added 15 commits

215115df - js doc updated
cde055c5 - Functions changed into a class
3ad75d78 - rectangles can be drawn with color gradient
8ce70eac - in case no overlay is defined proper color is used
1754fa3d - overlay aliases are processed only on a submap when it's necessary
fea5c0da - showing overlay reactions and aliases separated into different methods
af71ca6b - topmap shows availability of submap data overlay on anchors
602c91d8 - alias surface can show gradient data
2d9198e7 - submap data overlays are visualized on top map anchor
77196d27 - colors on anchors are sorted
11e9fb84 - visualizaition of gradient bars improved
b8e37137 - alias info window refacored - overlay data is obtained on demand by creating chart function
457e586c - alias info window show data from submaps on anchros
6ccbf06e - unit test for creating chart for alias with submap links
a2147369 - computing colors for gradient data moved to a common function

unmarked as a Work In Progress

enabled an automatic merge when the pipeline for a2147369 succeeds

mentioned in commit ad49683b

merged

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