TT#68016 selenium: dont crash script if select_if_unselected cant find elem

FirefoxExtensions.pm:
- prevent crashing the script when select_if_unselected()  and
unselect_if_selected() cannot find specified element

Change-Id: I55c1f41f57c77be27020edafd44be474830dc9d1
(cherry picked from commit 24408a15d4)

t/lib/Selenium/Remote/Driver/FirefoxExtensions.pm

@@ -49,25 +49,27 @@ sub find_text {
 sub select_if_unselected {
     my ($self, $query, $scheme) = @_;
     $scheme //= "xpath";
+    try {
         my $elem = $self->find_element($query, $scheme);
-    return 0 unless $elem;
-    return 0 unless $elem->is_displayed;
         if (! $elem->is_selected() ) {
             $elem->click;
         }
         return 1;
+    };
+    return 0;
 }
 
 sub unselect_if_selected {
     my ($self, $query, $scheme) = @_;
     $scheme //= "xpath";
+    try {
         my $elem = $self->find_element($query, $scheme);
-    return 0 unless $elem;
-    return 0 unless $elem->is_displayed;
         if ($elem->is_selected() ) {
             $elem->click;
         }
         return 1;
+    };
+    return 0;
 }
 
 sub fill_element {