[CHERRY-PICK] fix(pinned/search popups): use short date format #19372
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Cherry-pick of #19338
What does the PR do
Locale.ShortFormatin AppSearch and PinnedMessagesPopupFixes #19334
Affected areas
AppSearch and PinnedMessagesPopup
Architecture compliance
My PR is consistent with this document: QML Architecture Guidelines
Screencapture of the functionality
AppSearch:

PinnedMessagesPopup:

Impact on end user
Better UX on mobile