[IMP] add XID to view name in Ace editor dropdown

When looking for template bit to override or alter (in-core) through the Ace
editor, displaying only the name is a pain:

- the name generally sucks diseased donkey balls
- having to go through the code to find out what the template's XID is is a
  waste of time
[IMP] display view's XID *below* the selection

* Looks better
* Allows for a label
* Allows for longer template names and ids without cutting off
* Room to grow more info bits
Merge pull request #354 from xmo-odoo/editor-xmlid

[IMP] add XID to view name in Ace editor dropdown