D13101: Fix adding langs more than once within the same session.

[Eike Hein]

hein created this revision.
hein added a reviewer: davidedmundson.
Restricted Application added a project: Plasma.
hein requested review of this revision.

REVISION SUMMARY
  BUG:394455

REPOSITORY
  R119 Plasma Desktop

BRANCH
  Plasma/5.13

REVISION DETAIL
  https://phabricator.kde.org/D13101

AFFECTED FILES
  kcms/translations/package/contents/ui/main.qml

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