[Differential] [Request, 5 lines] D2363: Use prefered backend if none is specified

[cordlandwehr (Andreas Cord-Landwehr)]

cordlandwehr created this revision.
cordlandwehr added reviewers: Plasma, sebas.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  For out-of-process backends, only the KSCREEN_BACKEND environment
  variable is considered while loading. If none is set, fall-back
  to the preferred backend.
  
  BUG: 365040

TEST PLAN
  Manual testing. Adding this fallback makes
  "kcmshell5 kscreen" show again with working KCM instead of a
  "No kscreen backend found..." message.

REPOSITORY
  rLIBKSCREEN KScreen Library

BRANCH
  Plasma/5.7

REVISION DETAIL
  https://phabricator.kde.org/D2363

AFFECTED FILES
  src/backendmanager.cpp

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: cordlandwehr, #plasma, sebas
Cc: plasma-devel, ali-mohamed, jensreuterberg, abetts, sebas
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