Ensure exsting instances can be seen on install.

tripal_jbrowse_page/includes/tripal_jbrowse_page.api.inc

@@ -48,6 +48,6 @@ function tripal_jbrowse_page_is_instance_public($instance_id) {
     }
   }
   else {
-    return FALSE;
+    return TRUE;
   }
 }