jvoisin
c544dadd55
Fix categories import from Thunderbird's OPML
Thunderbird OPML exports are looking like this:
```xml
<opml version="1.0" xmlns:fz="urn:forumzilla:">
<head>
<title>Thunderbird OPML Export - RSS</title>
<dateCreated>Sat, 24 Feb 2024 11:31:13 GMT</dateCreated>
</head>
<body>
<outline title="News">
<outline type="rss" ...>
<outline type="rss" ...>
...
</outline>
<outline title="Blogs">
<outline type="rss" ...>
<outline type="rss" ...>
...
</outline>
</body>
```
This commit make it so that categories are now correctly imported.