D14077: [Folder View] Don't spawn multiple stat jobs for the same folder

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, hein.
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REVISION SUMMARY
  Check for one already running before spawning a new one.
  Also move the check for the `isDirCache` in one.

TEST PLAN
  My .desktop files pointing to folders are still treated as folders
  Doesn't spawn a gazillion of identical jobs on startup anymore

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D14077

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

To: broulik, #plasma, hein
Cc: plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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