talkatu/talkatu

Set layout managers for our GtkWidget subclasses
gtk4
2022-02-01, Gary Kramlich
bfd93f3bfba1
Set layout managers for our GtkWidget subclasses

Also disable the GtkBuildable for TalkatuScrolledWindow for now.

Testing Done:
Ran and verified the size allocation runtime warnings were gone.

Reviewed at https://reviews.imfreedom.org/r/1276/
Talkatu is versioned in [mercurial](https://www.mercurial-scm.org/) and is
available on [keep.imfreedom.org](https://keep.imfreedom.org/talkatu/talkatu).
All contributions are provided via review requests at [reviews.imfreedom.org](https://reviews.imfreedom.org/).