D13083: Respect custom directory icons in iconNameForURL()

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: Frameworks, apol, broulik.
ngraham requested review of this revision.

REVISION SUMMARY
  With `iconFromDirectoryFile()` a public function thanks to D13082 <https://phabricator.kde.org/D13082>, we can use it to get custom icons for folders without having to `stat` anything.

TEST PLAN
  - No test regressions
  - Adding a folder with a custom icon to the Places panel results in the new Places item getting the custom icon: F5864410: Places panel with inherited custom icon.png <https://phabricator.kde.org/F5864410>

BRANCH
  custom-icons (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D13083

AFFECTED FILES
  src/core/global.cpp

To: ngraham, #frameworks, apol, broulik
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