Add Edit word instead of OK

To be the same over all modules it rather should be EDIT and not OK. Why not adding EDIT to the lang and use it? ;)

spam/edit_manual.cgi

@@ -18,7 +18,7 @@ print &ui_form_start("edit_manual.cgi");
 print $form_hiddens;
 print "<b>$text{'manual_file'}</b>\n",
       &ui_select("manual", $in{'manual'}, \@files),"\n",
-      &ui_submit($text{'manual_ok'});
+      &ui_submit('Edit');
 print &ui_form_end();
 
 # Config editor