馃崚 applets/kicker: fix potential crash when modifying preferred applications
AppEntry::reload() will reparse configuration when the current entry is a preferred application. However, when reparsing configuration, the result watcher can also emit signals which will modify the entry list. So iterate over a copy of the entry list instead.
SENTRY: PLASMA-WORKSPACE-9PP FIXED-IN: 6.0.5
(cherry picked from commit 6c963b45)