Rendering the git graph on the server means that we can properly track flows and switch from the Canvas implementation to a SVG implementation.
* This implementation provides a 16 limited color selection
* The uniqued color numbers are also provided
* And there is also a monochrome version
*In addition is a hover highlight that allows users to highlight commits on the same flow.
Closes #12209
Signed-off-by: Andrew Thornton art27@cantab.net
Co-authored-by: silverwind <me@silverwind.io>
The current vendored gitgraph.js is no longer maintained and is
difficult to understand, fix and maintain.
This PR completely rewrites its logic - hopefully in a clearer fashion
and easier to maintain.
It also includes @silverwind's improvements of coloring the commit dots
and preventing the flash of incorrect content.
Further changes to contemplate in future will be abstracting out of the
flows to an object, storing the involved commit references on the flows
etc. However, this is probably a required step for this.
Replaces #12131
Fixes #11981 (part 3)
Signed-off-by: Andrew Thornton <art27@cantab.net>
