task: #3592406 Mark Default Admin beta and revert the revert

preset_accent_color: 'blue'

preset_focus_color: 'gin'

enable_dark_mode: '0'

high_contrast_mode: false

accent_color: ''

focus_color: ''

layout_density: 'default'

show_description_toggle: false

show_user_theme_settings: false

langcode: en

status: true

dependencies:

  module:

    - system

  theme:

    - default_admin

id: default_admin_breadcrumbs

theme: default_admin

region: breadcrumb

weight: 0

provider: null

plugin: system_breadcrumb_block

settings:

  id: system_breadcrumb_block

  label: Breadcrumbs

  label_display: '0'

  provider: system

visibility: {  }

langcode: en

status: true

dependencies:

  module:

    - system

  theme:

    - default_admin

id: default_admin_content

theme: default_admin

region: content

weight: 0

provider: null

plugin: system_main_block

settings:

  id: system_main_block

  label: 'Main page content'

  label_display: '0'

  provider: system

visibility: {  }

langcode: en

status: true

dependencies:

  module:

    - help

  theme:

    - default_admin

id: default_admin_help

theme: default_admin

region: help

weight: 0

provider: null

plugin: help_block

settings:

  id: help_block

  label: Help

  label_display: '0'

  provider: help

visibility: {  }

langcode: en

status: true

dependencies:

  theme:

    - default_admin

id: default_admin_local_actions

theme: default_admin

region: content

weight: -10

provider: null

plugin: local_actions_block

settings:

  id: local_actions_block

  label: 'Primary admin actions'

  label_display: '0'

  provider: core

visibility: {  }