Improve some labels

plugins/archive/localization/en_US.inc

@@ -27,8 +27,8 @@ $labels['archivetypeyear'] = 'Year (e.g. Archive/2012)';
 $labels['archivetypemonth'] = 'Month (e.g. Archive/2012/06)';
 $labels['archivetypetbmonth'] = 'Month - Thunderbird compatible (e.g. Archive/2012/2012-06)';
 $labels['archivetypefolder'] = 'Original folder';
-$labels['archivetypefolderyear'] = 'Year then original folder (e.g. Archive/...)';
-$labels['archivetypefoldermonth'] = 'Month then original folder (e.g. Archive/2012/...)';
+$labels['archivetypefolderyear'] = 'Year, then original folder (e.g. Archive/...)';
+$labels['archivetypefoldermonth'] = 'Month, then original folder (e.g. Archive/2012/...)';
 $labels['archivetypesender'] = 'Sender email';
 $labels['unkownsender'] = 'unknown';
 $labels['readonarchive'] = 'Mark the message as read on archive';