qt contact list: context menu fixups
qt contact list: context menu fixups

fixes #5048
fixes #5049

follow-up 9cff42328d5b6c92c87a2b41bb1f4e463c39aab7

pooler/electrum-ltc,spesmilo/electrum,pooler/electrum-ltc,vialectrum/vialectrum,neocogent/electrum,wakiyamap/electrum-mona,spesmilo/electrum,pooler/electrum-ltc,spesmilo/electrum,neocogent/electrum,vialectrum/vialectrum,fujicoin/electrum-fjc,fujicoin/electrum-fjc,neocogent/electrum,spesmilo/electrum,wakiyamap/electrum-mona,wakiyamap/electrum-mona,vialectrum/vialectrum,wakiyamap/electrum-mona,pooler/electrum-ltc,fujicoin/electrum-fjc