Kill current buffer when opening previous item.
Kill current buffer when opening previous item.

Otherwise buffers with read items hang around and distract user when he
tries to quit from item buffer to search buffer.

seblemaguer/elfeed,daimrod/elfeed,abo-abo/elfeed,holomorph/elfeed,jinnovation/elfeed,holomorph/elfeed,emacsmirror/elfeed,skeeto/elfeed,algernon/elfeed,daimrod/elfeed,seblemaguer/elfeed,algernon/elfeed,emacsmirror/elfeed,jinnovation/elfeed,skeeto/elfeed