show Gantt link on more /Search/ pages when possible

html/Callbacks/JSGantt/Elements/Tabs/Privileged

@@ -48,11 +48,17 @@
 <%INIT>
 my $request_path = $HTML::Mason::Commands::r->path_info;
 
-if ( $request_path =~ qr{^/Search/Results.html} ) {
-    my $tabs = PageMenu;
-    require Encode;
-    $tabs->child( 'gantt' => title => loc('Gantt Chart'),
-                    path => '/Search/JSGantt.html?Query=' . Encode::decode_utf8 $m->request_args->{'Query'} );
+if ( $request_path =~ qr{^/Search/} ) {
+    if ( $request_path =~ qr{^/Search/JSGantt.html} && $DECODED_ARGS->{Ticket} ) {
+        PageMenu->child( 'gantt' => title => loc('Gantt Chart'), path => '/Search/JSGantt.html?Ticket=' . $DECODED_ARGS->{Ticket} );
+    }
+    else {
+        my $current_search = $session{"CurrentSearchHash"} || {};
+        my $query = $DECODED_ARGS->{'Query'} || $current_search->{'Query'};
+        if ( $query ) {
+            PageMenu->child( 'gantt' => title => loc('Gantt Chart'), path => '/Search/JSGantt.html?Query=' . $query );
+        }
+    }
 }
 
 </%INIT>