Improves the Graph minimap
  - Adds `gitlens.graph.minimap.dataType` setting to choose between commits or lines changed to be used for the minimap
  - Adds a configuration popover for the minimap
  - Adds a legend to the minimap
  - Removes minimap from being experimental
    - Renames `gitlens.graph.experimental.minimap.enabled` to `gitlens.graph.minimap.enabled`
    - Renames `gitlens.graph.experimental.minimap.additionalTypes` to `gitlens.graph.minimap.additionalTypes`

* Allows hiding graph, ref, message columns
* Updates graph dependency
* Reorders column menus to be alphabetical

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Co-authored-by: Eric Amodio <eamodio@gmail.com>

Fixes scrubbing issues when data point is far vertically
Avoids translate hacks for inverted X axis

Fixes scroll markers z-index issues

* Add graph header context menu option to toggle mode

* Updates graph dependency

* Sends upstream id on a local branch ref to graph

* Avoids creating (allocating) & spreading an object

* Updates graph dependency

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Co-authored-by: Eric Amodio <eamodio@gmail.com>