* ivy.el (ivy-occur-mode-map): Move `ivy-occur-press' from "g" to "f".
Bind "g" to `ivy-occur-revert-buffer'.
(ivy-occur-revert-buffer): New command. Does what e.g. `revert-buffer'
does for *Help* buffers.
* swiper.el (swiper-faces): Add :group and :type.
(swiper-occur): Try to avoid calling `ivy-occur-grep-mode' as it will
kill all local variables.
(swiper--action): Update so that `ivy-occur-toggle-calling' works properly.