* Enable @babel/plugin-proposal-decorators
Dependency already exists
* Use tippy.js delegate addon, cleanup tippy instances from a mixin.
The delegate addon creates tippy instances from mouse and touch events
with a matching `event.target`. This is initially significantly cheaper
than creating all instances at once. The addon keeps all created tippy
instances alive until it is destroyed itself.
`tippyMixin` destroys the addon instance after every render, as long as
all instances are hidden. This drops some tippy instances that may have
to be recreated later (e.g when the mouse moves over the trigger again),
but is otherwise fairly cheap (creates one tippy instance).
* Restore scroll positions when resource loading settles.
The history module generates a random string (`location.key`) for every
browser history entry. The names for saved positions include this key.
The position is saved before a route component unmounts or before the
`location.key` changes.
The `scrollMixin` tires to restore the scroll position after every
change of `location.key`. It only does so after the first render for
which the route components `loadingSettled()` returns true.
Things like `scrollToComments` should only scroll when `history.action`
is not "POP".
* Drop individual scrollTo calls
* Scroll to comments without reloading post
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Co-authored-by: SleeplessOne1917 <28871516+SleeplessOne1917@users.noreply.github.com>
