OOjs UI Popups position themselves automatically relative to their
$floatableContainer these days.
Also added explicit `$floatableContainer: this.$element` in the config
(although not strictly needed, since the parent node is used by
default, this makes the code more robust in case we move the popup
somewhere else in the DOM).
Bug: T167751
Change-Id: Id4267fce6499a4c217f7dc1d18871c02dd078aee
Tools only setup once now, and that is during the dummy surface
phase, so we have to setup the education popups then.
Change-Id: Idf46fe42c893c0692dc442226297253074ef9bd7
If a tool had an education popup bound to it, but it was
suppressed because the user has already seen it (according to
the cookie or localStorage), then clicking that tool would
cause a JS error.
Also remove a workaround for a ClippableElement problem
that appears to be unnecessary.
Change-Id: I73a3f5f9cc1726e28e70fc545b72960afc5ac41c
