D28683: Get rid of workaround that prevents file dialog from being blocked

[Alexander Volkov]

volkov created this revision.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
volkov requested review of this revision.

REVISION SUMMARY
  Invisible proxy QDialog blocks input when the native dialog is shown,
  and the workaround is to show the native file dialog with a delay.
  But it's not needed since Qt 5.13 after the
  QPlatformDialogHelper::DialogIsQtWindow hint was introduced.

REPOSITORY
  R135 Integration for Qt applications in Plasma

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D28683

AFFECTED FILES
  autotests/kfiledialog_unittest.cpp
  autotests/kfiledialogqml_unittest.cpp
  src/platformtheme/kdeplatformfiledialogbase.cpp
  src/platformtheme/kdeplatformfiledialogbase_p.h
  src/platformtheme/kdeplatformfiledialoghelper.cpp
  src/platformtheme/kdeplatformfiledialoghelper.h

To: volkov
Cc: plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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