qt address list: check internal address corruption when copying address
qt address list: check internal address corruption when copying address

regressing following c721e880d0e203c770328d0830a37bd78eeae0e2

note that place_text_on_clipboard is overridden in AddressList

wakiyamap/electrum-mona,spesmilo/electrum,wakiyamap/electrum-mona,pooler/electrum-ltc,wakiyamap/electrum-mona,spesmilo/electrum,pooler/electrum-ltc,vialectrum/vialectrum,vialectrum/vialectrum,spesmilo/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,vialectrum/vialectrum,pooler/electrum-ltc,spesmilo/electrum