Adds isOfRefType to branch/tag/commit/ref

Opens Welcome for v10

Confirm toggle is dependent on the active selection

Replaces terminal merge with merge git command
Replaces terminal rebase with rebase git command

Giving up on better else/catch/finally formatting -- can't fight anymore
Switching to tabs for better accessibility
https://twitter.com/sh4na/status/1146837957200027648

Partial fix for #281- covers the `*@users.noreply.github.com` case.

The `users.noreply.github.com` domain comes from users
making use GitHub's 'email privacy' feature.
Since the noreply address doesn't accept email, a user can't link
their preferred Gravatar to this type of email address.

The upside is that this address is easily parsable into:
* (optional) Github User ID
* Github User Name

We can use either to create the associated avatar link
without actually having to do an additonal request
against Github's user search API.

Shortens confirm toggle tooltips

Git 2.23.0 splits checkout into switch & restore

Reworks generator types

Moves all lodash into system

Changes stash[Apply|Delete|Save] commands to use new git commands

Adds explicit directive for going back
Adds command error logging
Removes unneeded abort error

Adds arbitrary ref support to cherry-pick git command
Enhances the feedback when choosing an arbitrary ref

Changes checkout in views to run via git commands
Changes fetch in views & palette to run via git commands
Changes pull in views & palette to run via git commands
Changes push in views & palette to run via git commands
Adds skip confirmation support for some git commands
Adds gitCommands.skipConfirmation setting
Adds force option to push git command
Adds local branch creation to remote branch checkout git command
Adds arbitrary ref support to checkout git command

Fixes focus issues with compare picker