Desktop: Fixes #11597: OneNote Importer should only use text on fallback title

[pedr]

Fixes #11597

Summary

OneNote has a similar behaviour to Joplin where when a note doesn't have a title it uses the first paragraph as the fallback title. Differently from Joplin, this doesn't seems to alter the original note, happening only in the user interface, since the title property is empty in these cases.

The logic already implemented gets the first Section outline (equivalent to the first paragraph) and uses it as the title, the missing logic here was to remove the hyperlink part of it when it exists so the title doesn't get too long causing.

Note

This change only modifies the content of the title, it shouldn't affect the content shown in the body

Testing

I added a test notebook with three types of notes without title:

• one that links Wikipedia,
• other that links another note via the web view (links to onedrive)
• and other that links that uses the onenote: protocol