Qt CompletionTextEdit: cast KeyboardModifiers to int
Qt CompletionTextEdit: cast KeyboardModifiers to int

closes https://github.com/spesmilo/electrum/issues/7979

pooler/electrum-ltc,spesmilo/electrum,pooler/electrum-ltc,spesmilo/electrum,pooler/electrum-ltc,spesmilo/electrum,spesmilo/electrum,pooler/electrum-ltc