Detects Ctrl+Shift+V (or any "Paste shortcut with extra Shift") in a way that survives non-Latin keyboard layouts. QKeyEvent::matches() only looks at the layout-translated key(), so on Russian etc. the V key reports as Cyrillic М and stripping Shift is not enough. QKeyMapper::possibleKeys() returns the Latin fallback as one of the alternatives, which is exactly what QShortcutMap uses for plain Ctr
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