use shortcut echo syntax for php templates

classes/feeds.php

classes/handler/public.php

classes/pref/feeds.php

classes/pref/filters.php

classes/pref/labels.php

classes/pref/system.php

include/login_form.php

index.php

plugins/af_redditimgur/init.php

plugins/auth_internal/init.php

plugins/toggle_sidebar/init.php

prefs.php