Issue #2249995 by mgifford, Lukas von Blarer: Clean up hover/focus - In Seven.

core/themes/seven/css/base/elements.css

core/themes/seven/css/components/buttons.theme.css

core/themes/seven/css/components/dropbutton.component.css

core/themes/seven/css/components/pager.css

core/themes/seven/css/components/quickedit.css

core/themes/seven/css/components/skip-link.css

core/themes/seven/css/components/tables.css

core/themes/seven/css/components/tabs.css

core/themes/seven/css/components/tour.theme.css

core/themes/seven/css/components/views-ui.css