* Added icons to hide and show ref nodes of the graph

* Added context menu option to hide branches

* Moved "Hide branch" option to the bottom of the menu

* Changes from code review, including

 - Renames some events/methods
 - Fixes context menus
 - Removed unnecessary debounce

* Validate the hidden refs against the real set of refs

* Typed "refType" property  and added to our d.ts file instead of using an string

* Created a "graph only" wrapper for the GitBranchReference rather than adding it to the general model

* Graph exposed event when hiding refs has been modified to accept a list of hidden refs

* Generic context menu when right-click on the overall ref to hide the whole ref.

* Commented hidden refs validation for v13, as it has too much performance impact. Will be solved after we launch v13 as tech debt

- includes words touching the cursor in operator query
- prefixes help message with the operator type

- updates features step
- adds integrations step

Controls how the Commit Details view is shown by the graph
Honors avatar setting in remote icons

Adds graph context menus for virtual GitHub repos
Adds comparison commands to the graph
Fixes `when` clause contitions for some commands

Adds ref PR context menus

Adds Open Details to commits & stashes in views

Hides commit graph icon in hovers if plus features are disabled

Changes to tokenization to avoid duplicate replacements on multiple passes

Adds html formatting to autolinks
Fixes #2203 autolinks missing from Commit Details view

- Avoids lots of re-renders and avoids exrta difing
Improves commit search
 - Honors match case for file searches
 - Better parsing of search input for files and changes
 - Honors quotes for verbatim passing to Git
Overhauls graph search
 - Adds order to search results to ensure ordering
 - Adds basic error reporting for invalid search queries
 - Adds shift-click to prev/next buttons to go to first/last
 - Adds warning to search result count when some results are hidden
 - Improves search accuracy and accessibility
 - Improves search keyboarding
 - Tracks search result count based on selection
 - Fixes search paging issues
 - Fixes issues with "hidden" commits e.g. stash related
Fixes `isReady` issues when refreshing/reloading webviews