Updated to new CS conventions.

modules/gridstack_ui/src/Controller/GridStackListBuilder.php

modules/gridstack_ui/src/Form/GridStackDeleteForm.php

modules/gridstack_ui/src/Form/GridStackFormBase.php

modules/gridstack_ui/src/Form/GridStackSettingsForm.php

...s/gridstack_ui/src/Form/GridStackVariantSelectionForm.php

src/Engine/GridStackEnginePluginBase.php

src/Entity/GridStack.php

src/Entity/GridStackBase.php

src/Form/GridStackAdmin.php

src/GridStackManager.php

src/GridStackManagerInterface.php

src/Plugin/Field/FieldFormatter/GridStackFormatterTrait.php

src/Plugin/Field/FieldFormatter/GridStackMediaFormatter.php

src/Plugin/gridstack/stylizer/MediaForm.php

src/Plugin/views/style/GridStackViews.php

tests/src/Kernel/Form/GridStackSettingsFormTest.php

tests/src/Kernel/GridStackCrudTest.php

tests/src/Kernel/GridStackManagerTest.php

tests/src/Kernel/Views/GridStackViewsTest.php

tests/src/Unit/Form/GridStackAdminUnitTest.php