List bundles stored onFor each bundle listed in the instance UI (name + creation date + sizesee JENKINS-35341) the administrator should be able to download it
For each bundle listed in the UI (see JENKINS-35341) the administrator should be able to download it
*Nice to have:* Like in the plugins manager a checkbox allow to select each entry, a link allow to select or unselect all of them and an action allow to download all selected entries