talkatu/talkatu

Update the demo to default the author to Alice and add a keybinding for ctrl-w
gtk4
2022-02-02, Gary Kramlich
a315690c201a
Update the demo to default the author to Alice and add a keybinding for ctrl-w

Testing Done:
Ran the demo and verified the author was set and that ctrl-w closed the window and therefore the application.

Reviewed at https://reviews.imfreedom.org/r/1281/
Talkatu is versioned in [mercurial](https://www.mercurial-scm.org/) and is
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