* web: break circular dependency between AKElement & Interface.
This commit changes the way the root node of the web application shell is
discovered by child components, such that the base class shared by both
no longer results in a circular dependency between the two models.
I've run this in isolation and have seen no failures of discovery; the identity
token exists as soon as the Interface is constructed and is found by every item
on the page.
* web: fix broken typescript references
This built... and then it didn't? Anyway, the current fix is to
provide type information the AkInterface for the data that consumers
require.
* web: rollback dependabot's upgrade of context
The most frustrating part of this is that I RAN THIS, dammit, with the updated
context and the current Wizard, and it finished the End-to-End tests without
complaint.
* web: bugfix: broken backchannel selector
There were two bugs here, both of them introduced by me because I didn't understand the
system well enough the first time through, and because I didn't test thoroughly enough.
The first is that I was calling the wrong confirmation code; the resulting syntax survived
because `confirm()` is actually a legitimate function call in the context of the DOM Window,
a legacy survivor similar to `alert()` but with a yes/no return value. Bleah.
The second is that the confirm code doesn't appear to pass back a dictionary with the
`{ items: Array<Provider> }` list, it passes back just the `items` as an Array.
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