v2.0.20

• Updated: The dashboard, the commit details and the Backup page are built from the
  administration's shared components (cards, buttons, badges, notices, tables, filter bar, folds,
  facts, empty states) and its --a4-* tokens, so they follow admin4's dark mode: no more white
  cards and unreadable text on a dark page. What the components cannot do is
  design/standard/stylesheets/modules/git_manager.css (.a4-gm-* classes on the tokens only), loaded
  through design.ini [StylesheetSettings] BackendCSSFileList. The old git_manager.css is removed;
  a site that overrides one of the templates and uses its .gm-* classes keeps the markup but needs
  the new classes for the look.
• Updated: No inline script and no inline style is left in the templates. The behaviours are
  design/standard/javascript/git_manager.js (ezscript_require), with their texts as data-gm-*
  attributes of the page; the author initials take one of the chart colors by class.
• Added: The Git tab has its own left menu, menu.ini [Leftmenu_gitmanager] (Git Manager, Backup),
  on the dashboard and the commit details, with admin4's width switch like every other module
  (parts/gitmanager/menu.tpl). The Backup page stays under Setup.
• Updated: Every form, button name and confirmation is kept. New strings are translated in eng-US
  and ger-DE. tests/unit/AdminStylingTest.php checks the rules on the files.