D19763: [Desktop Theme KCM] Emit current index change when resetting the model

[Kai Uwe Broulik]

broulik created this revision.
broulik added a reviewer: Plasma.
Herald added a project: Plasma.
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REVISION SUMMARY
  When the model is reset, `GridView` invalidates its `currentIndex` resulting in no theme being selected.

TEST PLAN
  Installed a new theme via GHNS, "Breeze" was still highlighted as current. Before none was highlighted.
  Verified that Apply button isn't erroneously activated

REPOSITORY
  R119 Plasma Desktop

REVISION DETAIL
  https://phabricator.kde.org/D19763

AFFECTED FILES
  kcms/desktoptheme/kcm.cpp

To: broulik, #plasma
Cc: plasma-devel, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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