mesonium authored Nov 25, 2022 and Philipp Hörist committed Dec 08, 2022

* Remove the delay when starting a playback
* Don't scrub during seek when dragging the slider
* Don't open audio stream connections before playing
* Determine the duration early to prevent missing duration info
+ Show total duration
+ Add option to display remaining play time
+ Add possibility to seek by clicking into the seekbar
+ Add possibility to seek by scrolling with the mouse wheel
+ Add fast forward and rewind buttons
+ Add buttons to change the playback speed
+ Add automatic restoration of the audio player settings in a session
+ Add automatic stop of other streams when starting to play
+ Add a visualization of the RMS peaks

We want the behavior of groupchat-join, but not only for group chats.
This consolidates the code into the open-chat action.

...by storing them in `href` attributes as internal-use
`about:ambiguous-address?a@b.c` URIs.

Storing raw `a@b.c` in `href` wouldn't make a lot of semantic sense, as
that's a relative-path URI with the meaning of "the thing named 'a@b.c'
in the same directory as the current document".  Plus, it would either
entail handling these addresses outside `parse_uri()`, or changing its
purpose of parsing only absolute URIs.

* Immediately switch to the chat if already open.
* Don't "crash" if current account is offline.

No casts/type assertions needed now.

...and cover missing URITypes, adding "coverage" tests.

This method is not expensive and only called a few times