1.5.6

Added

• Allow to cancel a queued job (#606, #611)
• Show mailbox name in conversations search.

Fixed

• Fixed sorting in the search (#608)
• Show (no subject) for previous conversations without a subject.

Changed

• View some attachments in the browser instead of downloading them (#609): jpg, jpeg, jfif, pjpeg, pjp, apng, bmp, gif, ico, cur, png, svg, tif, tiff, webp, pdf, txt
• Updated translations: de, es, fr, pl.