fix one test and add diagnostics to other

xt/selenium/email_preferences.t

@@ -352,6 +352,9 @@ sub verify_bugmail_recipients {
     my $wanted_sentto;
     my $err = 0;
 
+    my ($package, $filename, $line) = caller;
+    diag "verify_bugmail_recipients called from $filename line $line";
+
     # Verify sentto field
     my @email_sentto
         = sort split(/, /, $sel->get_text("//dt[text()='Email sent to:']/following-sibling::dd"));

xt/selenium/user_preferences.t

@@ -72,7 +72,7 @@ $sel->value_is("addselfcc", "off");
 $sel->type_ok("quicksearch_top", "tag:sel-tmp");
 $sel->click_ok("find_top");
 $sel->wait_for_page_to_load_ok(WAIT_TIME);
-$sel->title_is("Bug List");
+$sel->title_is("Bug List: tag:sel-tmp");
 $sel->type_ok("save_newqueryname", "sel-tmp");
 $sel->click_ok("remember");
 $sel->wait_for_page_to_load_ok(WAIT_TIME);