talkatu/talkatu

Fix the input in the demo.
gtk4
2022-02-03, Gary Kramlich
1819a3f27516
Fix the input in the demo.

We had some over zealous can-focus's set to 0 which was the main issue. The
other stuff was just stuff to clean up I found along the way.

Testing Done:
Ran the demo verified I can input text. Sending is still broken but that's another matter entirely...

Reviewed at https://reviews.imfreedom.org/r/1283/
<h1>Plugin Info</h1><dl><dt>foobar</dt><dd><b>id</b>: asdlkfjalsdkjf</dd><dt>barbaz</dt><dd><b>id</b>: 234983</dd></dl>
<a href="https://pidgin.im">Test link</a>
<b>bold</b> <u>under</u> <i>italic</i> <em>emphasis</em> <strike>strike</strike> <sup>sup</sup> <sub>sub</sub> .<sup>.</sup>.<sub>.</sub>.
<b>foo <i>bar <u>baz <strike>qux</strike></u></i></b>
<pre>
pre
formatted
text
!!
!
</pre>
<code>
tag = gtk_text_tag_new("sup");
g_object_set(
G_OBJECT(tag),
"rise", 5000,
NULL
);
gtk_text_tag_table_add(text_table, tag);
g_object_unref(G_OBJECT(tag));
</code>
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