D12095: convert setDirLister to the new connect syntax

[Jaime Torres Amate]

jtamate created this revision.
jtamate added reviewers: dfaure, Frameworks.
Restricted Application added a project: Frameworks.
jtamate requested review of this revision.

REVISION SUMMARY
  The only tricky part is the use of QOverload<>::of to distinguish between signals with same name but different signatures.

TEST PLAN
  kdirmodeltest passes all tests.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D12095

AFFECTED FILES
  src/widgets/kdirmodel.cpp

To: jtamate, dfaure, #frameworks
Cc: michaelh, ngraham, bruns
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