Drawer: missing functionality

[berenddeboer]

• Drawer has subscriptions but does not appear to use them, can this code be removed?
• Drawer list: support arrow keys. This will probably be fixed when lists get keyboard control, and we can then use the list inside here.
• Dismissible and modal drawers: support Esc to close
• Dismissible drawer: open animation is off: the content should slide in from the left.

[berenddeboer]

The issue with the dismissible drawer seems to be that the "endtransition" event fires early, perhaps related to some transition we do in the list? The evt.target.className is "mdc-list-item mdc-list-item--activated mdc-ripple-upgraded mdc-ripple-upgraded--background-focused", so that's quite wrong.

So the animation is ended prematurely, and the aside doesn't slide in properly.

[berenddeboer]

A cheap way to fix this is to set Lists.nonInteractive when the drawer is not yet fully open. However, that requires work from the user, this is something we need to handle transparently. Not sure how the MDC does this yet, they would have the same problem.