D21249: Test current filter before setting a new one

[Nathaniel Graham]

This revision was not accepted when it landed; it landed in state "Needs Review".
This revision was automatically updated to reflect the committed changes.
Closed by commit R241:c4e90b5a6bf4: Test current filter before setting a new one (authored by jglogowski, committed by ngraham).

REPOSITORY
  R241 KIO

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D21249?vs=58427&id=58435

REVISION DETAIL
  https://phabricator.kde.org/D21249

AFFECTED FILES
  autotests/kfilewidgettest.cpp
  src/filewidgets/kfilewidget.cpp

To: jglogowski, #frameworks, ngraham, dfaure
Cc: elvisangelaccio, ngraham, michaelweghorn, kde-frameworks-devel, michaelh, bruns
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