update old br tags to HTML5 standards

gui/slick/js/ajaxNotifications.js

gui/slick/js/configSearch.js

gui/slick/js/confirmations.js

gui/slick/js/lib/pnotify.custom.min.js

gui/slick/js/new/displayShow.js

gui/slick/js/newShow.js

gui/slick/views/apiBuilder.mako

gui/slick/views/config.mako

gui/slick/views/config_anime.mako

gui/slick/views/config_backuprestore.mako

gui/slick/views/config_general.mako

gui/slick/views/config_notifications.mako

gui/slick/views/config_postProcessing.mako

gui/slick/views/config_providers.mako

gui/slick/views/config_search.mako

gui/slick/views/config_subtitles.mako

gui/slick/views/editShow.mako

gui/slick/views/home_addExistingShow.mako

gui/slick/views/home_addShows.mako

gui/slick/views/home_newShow.mako