D15508: Update disk space info on refresh

[Nathaniel Graham]

ngraham accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R318 Dolphin

REVISION DETAIL
  https://phabricator.kde.org/D15508

To: broulik, #dolphin, elvisangelaccio, sitter, ngraham
Cc: kfm-devel, feverfew, spoorun, navarromorales, firef, andrebarros, emmanuelp
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