theming Theming

Adjust the F7cloud theme

Adjust the F7cloud theme 2.7.0 agpl F7cloud Theming customization https://github.com/f7cloud/server/issues OCA\Theming\Migration\InitBackgroundImagesMigration OCA\Theming\Command\UpdateConfig OCA\Theming\Settings\Admin OCA\Theming\Settings\AdminSection OCA\Theming\Settings\Personal OCA\Theming\Settings\PersonalSection