D8601: Avoid blocking DBus calls when extracting files

[David Edmundson]

davidedmundson created this revision.
davidedmundson added a reviewer: Plasma.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  When copying from Ark to the desktop we make a blocking DBus call,
  freezing the entire UI until the extraction completes.
  
  We don't do anything with the reply, so lets not bother waiting for it.

TEST PLAN
  Ran Q_DBUS_BLOCKING_CALL_MAIN_THREAD_WARNING_MS=0 plasmashell
  Copied something from ark to the desktop.
  Still had the file, but didn't block

REPOSITORY
  R119 Plasma Desktop

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8601

AFFECTED FILES
  containments/desktop/plugins/folder/foldermodel.cpp

To: davidedmundson, #plasma
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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