Resp. directories for the database, and both dirs and symlinks for
`FileInfo.FileSize`. Instead handle it in the UI progress percentage. We
even already have special cases there for deletions, might as well
handle directories just like any other zero-sized needed item there.
This went through the very thorough testing of running it on my laptop,
the migration was applied and it seemed to be working fine after.
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Signed-off-by: Simon Frei <freisim93@gmail.com>
c9236b1adc