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David Faure authored
Summary: This also allows to only emit launcherCountChanged() when it actually changed. The emit from TasksModel::filterAcceptsRow() is weird though. Test Plan: adding one launcher for dolphin, shows up. Running dolphin, the launcher disappears. Switching desktops, it reappears. Coming back, it disappears. Closing dolphin, the launcher reappears. Reviewers: hein Reviewed By: hein Subscribers: broulik, plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D1865
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