Overview of changes in 3.50.2
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* Setup Dialog
  - fix provider icon style
  - fix dialog not closing when cancelled
* Exchange
  - fix account setup field verification
* Microsoft 365
  - fix account storage
  - fix identity retrieval
  - fix email retrieval
* WebDAV
  - fix Fastmail and mailbox.org endpoints
  - fix for content-restricted app passwords
* Translations
  - Mark a user-visible string as translatable
  - Translation updates