move commandAction out of CmdLine.Seek

This is groundwork for nested seek loops, eg seeking over all files and
then performing commandActions on a list of remotes, which can be done
concurrently.

This commit was sponsored by Boyd Stephen Smith Jr. on Patreon.

Command/ReKey.hs

@@ -50,7 +50,7 @@ batchParser s = case separate (== ' ') (reverse s) of
 seek :: ReKeyOptions -> CommandSeek
 seek o = case batchOption o of
 	Batch fmt -> batchInput fmt batchParser (batchCommandAction . start)
-	NoBatch -> withPairs (start . parsekey) (reKeyThese o)
+	NoBatch -> withPairs (commandAction . start . parsekey) (reKeyThese o)
   where
 	parsekey (file, skey) =
 		(file, fromMaybe (giveup "bad key") (file2key skey))