mgr/dashboard: Render all objects in KV-table

mgr/dashboard: Render all objects in KV-table

The problem was that the key value table didn't render all objects in
the given object, even if 'renderObjects' was set to true.

For example you give it an object with 2 attributes each of them holds a
non empty object, this will result in a table data that is not fully
converted to key value objects, which will result as text '[Object
object]' in the table view.

Now every object will be rendered and the key value array will be sorted
by key.

Fixes: https://tracker.ceph.com/issues/37859
Signed-off-by: Stephan Müller <smueller@suse.com>