improved artist view

src/main.sh

@@ -192,9 +192,10 @@ while true; do
           --info-command="echo \"Search music artist\"" \
           --accept-nth="{1}" \
           --with-nth="{2}" \
-          --preview-window="wrap" \
+          --preview-window="right,25%,border-left,wrap,<30(hidden)" \
           --preview="$0 --internal-preview-artist {1}" \
           --bind="ctrl-d:half-page-down,ctrl-u:half-page-up" \
+          --bind="down:preview-half-page-down,up:preview-half-page-up" \
           --bind="change:execute-silent($0 --internal-search \$FZF_QUERY &)+reload($0 --internal-reload)"
     )
     [ "$sel" ] && set -- "--show-artist" "$sel"