Cache manage UI tabs (don't reload when changing tabs)

The jQuery UI Tab options cache and ajaxOptions were removed in version
1.10 . I replaced both with the beforeLoad function (as suggested in the
official documentation).

Not caching the tabs lead to problems when changing tabs to assign
tokens to users or similar.

You can still reload a tab by reloading the whole page, or using
tab-specific controls.

refs #12696

Change-Id: I1b74e90bab1e6ecbbff49270b7060d616dd99a3c