D16678: Fix root disk icon change so that it doesn't erroneously change other icons

[Nathaniel Graham]

ngraham edited the test plan for this revision.

REPOSITORY
  R245 Solid

REVISION DETAIL
  https://phabricator.kde.org/D16678

To: ngraham, bruns, broulik, davidedmundson
Cc: kde-frameworks-devel, michaelh, ngraham, bruns