D13082: Make iconFromDirectoryFile() and iconFromDesktopFile() public in KIOCore

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: Frameworks, apol.
Restricted Application added a project: Frameworks.
Restricted Application added a subscriber: kde-frameworks-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  This allows us to use them in KIO::iconNameForURL() to gain custom folder icon support without needing to `stat` anything.
  
  CCBUG: 356045

TEST PLAN
  - No visual regressions in Dolphin
  - No unit test regressions

REPOSITORY
  R241 KIO

BRANCH
  public-iconFromDesktopFile-and-iconFromDirectoryFile (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D13082

AFFECTED FILES
  src/core/global.cpp
  src/core/global.h
  src/core/kfileitem.cpp

To: ngraham, #frameworks, apol
Cc: kde-frameworks-devel, michaelh, ngraham, bruns
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