Broken uri encoding in mopidy calls in 3.56

[2e0byo]

Describe the bug
3.56 breaks URI encoding for unicode tracks.

To Reproduce
Steps to reproduce the behavior:

1. Enable Test Mode (Settings > Debug > Test Mode). This provides more verbose error logs.
2. Select a track with unicode chars in the uri.
3. Add to queue.
4. Track is not added.
5. Select 'play'.
6. Iris notices it failed to enqueue the track.

Expected behavior
Track is enqueued.

Console log
from MOPIDY_ENQUEUE_URIS

With 3.55.4 the uri is:
"local:track:Non-Album/St%C3%A9phane%20Golmann/Actualit%C3%A9s.m4a"

With 3.56.1 the uri is:
"local:track:Non-Album/Stéphane%20Golmann/Actualités.m4a"

Environment details:

• OS: Linux (various)
• Browser: Qutebrowser
• Iris version: 3.56.1/3.55.4

Additional context

Apologies to take so long to test 3.56 after it closed #601. #601 is only partially resolved; I've commented over there.

Really sorry not to offer anything more constructive than a bug report! I'm drowning in other code atm. Will have a look at this if I get a chance.

[orontee]

Same problem here.

With mpc the following works well:

matthias@carbon:~ 
↳ mpc add local:track:Serge%20Gainsbourg/L%27Homme%20%C3%80%20T%C3%AAte%20De%20Chou%20%5BInt%C3%A9grale%2020%C3%A8me%20Anniversaire%5D/04%20Transit%20%C3%A0%20Marilou.flac

When I try to play the same song from the Local panel in Iris, I see the following message in /mopidy/ws/:

{"method":"core.tracklist.add","params":{"uris":["local:track:Serge%20Gainsbourg/L%27Homme%20�%20Tête%20De%20Chou%20%5BIntégrale%2020ème%20Anniversaire%5D/04%20Transit%20à %20Marilou.flac"],"at_position":0},"jsonrpc":"2.0","id":14}

and the response is (edited after I noticed a copy-paste error when writing that message, sorry):

{"jsonrpc": "2.0", "id": 14, "result": []}