ui: tree/ResourceTree: show Tags in tree

ui: tree/ResourceTree: show Tags in tree

and update the treenodes when the tags change.
since we change the vm node text (which we pass through to the config
panel), we have to change how we generate the text there slightly
(otherwise that would include the rendered tags)

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>