Issue #2264241 by _nod: Fix ESLint errors and fix js bugs.

core/misc/machine-name.js

core/modules/block/js/block.admin.js

core/modules/ckeditor/js/ckeditor.admin.js

core/modules/ckeditor/js/plugins/drupalimage/plugin.js

.../modules/ckeditor/js/plugins/drupalimagecaption/plugin.js

core/modules/contextual/js/contextual.toolbar.js

core/modules/quickedit/js/views/AppView.js

core/modules/system/system.modules.js

core/modules/views_ui/js/views-admin.js