Silverstripe Login-form (de)branding

Reduces the Silverstripe branding of the login forms module and makes it easily configurable:

The branding above- and credits below the form are configurable via Yaml, options:

Restruct\SilverStripe\AdminBranding\SecurityBrandingExtension:
  include_icon: true # default: true
  app_brand: 'Cycle App' # default: null (= just an icon/logo)
  built_by: 'Built by <a href="...">CoolCompany™</a>' # default: unconfigured-warning
  powered_by: 'Powered by <a href="https://silverstripe.org" target="_blank">Silverstripe</a>' # = default

Custom icon/logo/branding

Place a LoginIcon.ss template somewhere in [app]/templates/[Includes/] or themes/[client-theme]/templates/[Includes/], eg:

<!-- LoginIcon.ss - bike icon -->
<svg width="16" height="16" fill="var(--color-link-primary)" class="bi bi-bicycle" viewBox="0 0 16 16">
    <path d="M4 4.5a.5.5 0 0 1 .5-.5H6a.5.5 0 0 1 0 1v.5h4.14l.386-1.158A.5.5 0 0 1 11 4h1a.5.5 0 0 1 0 
    1h-.64l-.311.935.807 1.29a3 3 0 1 1-.848.53l-.508-.812-2.076 3.322A.5.5 0 0 1 8 10.5H5.959a3 3 0 1 
    1-1.815-3.274L5 5.856V5h-.5a.5.5 0 0 1-.5-.5m1.5 2.443-.508.814c.5.444.85 1.054.967 1.743h1.139zM8 
    9.057 9.598 6.5H6.402zM4.937 9.5a2 2 0 0 0-.487-.877l-.548.877zM3.603 8.092A2 2 0 1 0 4.937 
    10.5H3a.5.5 0 0 1-.424-.765zm7.947.53a2 2 0 1 0 .848-.53l1.026 1.643a.5.5 0 1 1-.848.53z"/>
</svg>
<!-- Optionally add some inline <style> while at it... -->

And configure:

# config.yml
Restruct\SilverStripe\AdminBranding\SecurityBrandingExtension:
  app_brand: 'Cycle App' # leave empty/unconfigured to show just the SVG (eg client's company logo)
  built_by: 'Built by <a href="https://restruct.nl" target="_blank">Restruct web & apps</a>'

(Legacy:) Replace header using custom AppBrand.ss template

Configure extension to use AppBrand.ss template instead:

Restruct\SilverStripe\AdminBranding\SecurityBrandingExtension:
  use_app_brand_template: true

Add an AppBrand.ss template file somewhere, eg [app]/templates/[Includes/] or themes/[client-theme]/templates/[Includes/]:

<a class="login-icon" href="$AbsoluteBaseURL">
    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-shield-lock" viewBox="0 0 16 16">
        <path d="M5.338 1.59a61.44 61.44 0 0 0-2.837.856.481.481 0 0 0-.328.39c-.554 4.157.726 7.19 2.253 9.188a10.725 10.725 0 0 0 2.287 2.233c.346.244.652.42.893.533.12.057.218.095.293.118a.55.55 0 0 0 .101.025.615.615 0 0 0 .1-.025c.076-.023.174-.061.294-.118.24-.113.547-.29.893-.533a10.726 10.726 0 0 0 2.287-2.233c1.527-1.997 2.807-5.031 2.253-9.188a.48.48 0 0 0-.328-.39c-.651-.213-1.75-.56-2.837-.855C9.552 1.29 8.531 1.067 8 1.067c-.53 0-1.552.223-2.662.524zM5.072.56C6.157.265 7.31 0 8 0s1.843.265 2.928.56c1.11.3 2.229.655 2.887.87a1.54 1.54 0 0 1 1.044 1.262c.596 4.477-.787 7.795-2.465 9.99a11.775 11.775 0 0 1-2.517 2.453 7.159 7.159 0 0 1-1.048.625c-.28.132-.581.24-.829.24s-.548-.108-.829-.24a7.158 7.158 0 0 1-1.048-.625 11.777 11.777 0 0 1-2.517-2.453C1.928 10.487.545 7.169 1.141 2.692A1.54 1.54 0 0 1 2.185 1.43 62.456 62.456 0 0 1 5.072.56z"/>
        <path d="M9.5 6.5a1.5 1.5 0 0 1-1 1.415l.385 1.99a.5.5 0 0 1-.491.595h-.788a.5.5 0 0 1-.49-.595l.384-1.99a1.5 1.5 0 1 1 2-1.415z"/>
    </svg>
    <h1 class="app-brand__logo">AppBrand</h1>
</a>

And set the theme as highest prio on SilverStripe\LoginForms\EnablerExtension (before #admin-branding):

---
Before:
  - '#admin-branding'
---
SilverStripe\LoginForms\EnablerExtension:
  login_themes:
    - 'client-theme'

Optionally set Restruct\SilverStripe\AdminBranding\SecurityBrandingExtension.include_icon to false to remove the icon.

Shield-lock + bicycle icons kindly provided by Bootstrap Icons.

SiteConfig Title Override

By default, the admin panel shows SiteConfig.Title (editable under Settings) in the left nav and browser tab. If you set LeftAndMain.application_name in config, it gets ignored when SiteConfig is installed.

This module can make application_name the authoritative source, overriding SiteConfig.Title in-memory and optionally removing the now-redundant fields from Settings.

# Set the application name
SilverStripe\Admin\LeftAndMain:
  application_name: 'My App'

# Enable the override
SilverStripe\SiteConfig\SiteConfig:
  application_name_overrides_title: true
  application_name_clear_fields: 'tab'  # see options below

application_name_clear_fields options

Value	Behavior
false	Override title but leave Title/Tagline fields in Settings
true (default)	Remove Title + Tagline fields from Settings
'tab'	Remove fields + remove the empty Main tab (if other tabs remain)